1-across – Established practice : TRADITION

8-across – Agreement, treaty : PACT

9-across – Own up, confess : COMECLEAN

10-across – Glide over : SKIM

13-across – Nose : SNOUT

15-across – Effect : IMPACT

16-across – Commission, message : ERRAND

17-across – Multiply by three : TREBLE

19-across – Outlaw : BANDIT

20-across – Wood nymph : DRYAD

21-across – Attack : RAID

24-across – Remain cropless : LIEFALLOW

25-across – Scorch : CHAR

26-across – Discouragement : DETERRENT

2-down – Cross, crucifix : ROOD

3-down – Regimen : DIET

4-down – Skill : TALENT

5-down – Not transparent : OPAQUE

6-down – In reverse : BACKWARDS

7-down – House-buying tax : STAMPDUTY

11-down – Unmade road : DIRTTRACK

12-down – Ball shaped : SPHERICAL

13-down – Berate : SCOLD

14-down – Walk : TRIAD

18-down – White fur : ERMINE

19-down – Perplex : BAFFLE

22-down – Slight : SLUR

23-down – Advance : LOAN

1-across – Indicate uncertainty : BEINTWOMINDS

9-across – Happen : OCCUR

10-across – Large, powerful short-haired dog : MASTIFF

11-across – Approach : NEAR

12-across – Writ : SUBPOENA

14-across – Voracious : HUNGRY

15-across – Make colourless : BLEACH

18-across – English county town : HERTFORD

20-across – Unfermented soya bean curd : TOFU

22-across – Submitting for consideration : TABLING

23-across – Garden implement : SPADE

24-across – ‘…that bit one’ completes a hangover remedy : HAIROFTHEDOG

2-down – Shackle : ENCHAIN

3-down – Average : NORM

4-down – Native American shells used as money : WAMPUM

5-down – Appropriate for the wrong use : MISAPPLY

6-down – Artless : NAIVE

7-down – Thoroughly secure : SAFEASHOUSES

8-down – 24’s toast, perhaps! : DOWNTHEHATCH

13-down – Scratching on walls, pottery, etc : GRAFFITO

16-down – Dull greenish colour : AVOCADO

17-down – Properly : ARIGHT

19-down – Jewish spiritual leader : RABBI

21-down – Eyot : ISLE

1-across – Hat made of plaited palm leaves : PANAMA

4-across – Constitution : MAKEUP

9-across – Grow less : DWINDLE

10-across – Tawdry : CHEAP

11-across – Belgian, French-speaking city : LIEGE

12-across – Coat? Yes : TEACOSY

13-across – Appear as old as you really are : LOOKONESAGE

18-across – Blade in a frame under tension : HACKSAW

20-across – Addictive narcotic : OPIUM

22-across – Solar System’s smallest planet : PLUTO

23-across – Controversial plant grown commercially : TOBACCO

24-across – Elegant : DRESSY

25-across – Vouchsafes : GRANTS

1-down – Small pool : PUDDLE

2-down – Green : NAIVE

3-down – Normal working day : MIDWEEK

5-down – Capital of Ghana : ACCRA

6-down – Soon : ERELONG

7-down – Caribbean fruit : PAPAYA

8-down – In agreement : BEATONEWITH

14-down – Block up : OCCLUDE

15-down – Dribble : SLOBBER

16-down – Fashioned : SHAPED

17-down – Carve figure in relief : EMBOSS

19-down – Picks out : SPOTS

21-down – Of an ancient Andean culture : INCAN

1-across – Control : LEADBYTHENOSE

8-across – Knives, forks and spoons : CUTLERY

9-across – Athenian Greek : ATTIC

10-across – Splash : SLOP

11-across – In phonetics, pronounced via throat : GUTTURAL

13-across – Loading funnel for solid materials : HOPPER

14-across – Kind of printer : INKJET

17-across – Seasickness : MALDEMER

19-across – Slightly open : AJAR

21-across – Shinbone : TIBIA

22-across – Upper house US Congressman : SENATOR

24-across – Took the initiative : CALLEDTHETUNE

1-down – Resinous insect secretion : LAC

2-down – Home of Earl Spencer : ALTHORP

3-down – The mangelwurzel, for instance : BEET

4-down – Put to experimental use : TRYOUT

5-down – Demanding : EXACTING

6-down – Freshwater carnivorous mammal : OTTER

7-down – Mechanised staircase : ESCALATOR

10-down – Plan : SCHEMATIC

12-down – Outlaw : RENEGADE

15-down – Martial art : JUJITSU

16-down – The rich and fashionable : JETSET

18-down – Calumnious writing : LIBEL

20-down – Joint : KNEE

23-down – Grain used in flour and whiskey : RYE

1-across – Badger : HASSLE

4-across – Unit of a poem : STANZA

8-across – Synthetic material : NYLON

9-across – Group living together, sharing all : COMMUNE

10-across – Ability to cope with life on board : SEALEGS

11-across – Canny : ACUTE

12-across – An unhappy existence : ADOGSLIFE

17-across – Resides : LIVES

19-across – Larger than average : OUTSIZE

21-across – Flightless bird : PENGUIN

22-across – Banish : EXILE

23-across – Complain loudly or persistently : YAMMER

24-across – In music, having no established key : ATONAL

1-down – Sincere : HONEST

2-down – Wife of an Eastern potentate : SULTANA

3-down – Pierce : LANCE

5-down – Percussion instruments : TIMPANI

6-down – Pacific republic, once Pleasant Island : NAURU

7-down – Tips : APEXES

9-down – Makes someone dejected : CASTSDOWN

13-down – Abstruse : OBSCURE

14-down – Omission : ELISION

15-down – Mawkish : SLOPPY

16-down – Make public : REVEAL

18-down – Spite : VENOM

20-down – 16th century Counter-Reformation council : TRENT