1-across – Person having unorthodox beliefs : HERETIC

5-across – Composer of Otello and Falstaff : VERDI

8-across – Convict given a long sentence : LIFER

9-across – Mocked : DERIDED

10-across – Panache : ELAN

11-across – Get on well : HITITOFF

13-across – Protective headgear : SUNHAT

14-across – Nincompoop : NITWIT

17-across – Vision : EYESIGHT

19-across – Chinese dynasty – strong taste : TANG

21-across – Whopping : TITANIC

22-across – Treatment for addiction : REHAB

23-across – Bucolic : RURAL

24-across – On the loose : ATLARGE

1-down – Fairground attraction – chaotic and hurried : HELTERSKELTER

2-down – Desist : REFRAIN

3-down – Mountain lake : TARN

4-down – Golfer’s attendant : CADDIE

5-down – Woolf or Wade? : VIRGINIA

6-down – Broadcast medium : RADIO

7-down – Tireless : INDEFATIGABLE

12-down – Logical : RATIONAL

15-down – Common British conversation topic? : WEATHER

16-down – Latin American dance : CHACHA

18-down – Computer key : ENTER

20-down – Type of exam : ORAL

7-across – Unaffected by emotion : DISPASSIONATE

9-across – Poem such as Gray wrote in a churchyard : ELEGY

10-across – Parvenu : UPSTART

11-across – Keen on reading : BOOKISH

13-across – Happen : OCCUR

15-across – Part of a car or a bike : PEDAL

16-across – Awful : ABYSMAL

18-across – Bun on the head : TOPKNOT

20-across – Car accident : PRANG

21-across – Comparatively small pugilist : FEATHERWEIGHT

1-down – Word ending in -ly? : ADVERB

2-down – Celestial body : ASTEROID

3-down – Misty : HAZY

4-down – Tale concocted to arouse sympathy : SOBSTORY

5-down – Spanish fizz : CAVA

6-down – Me, say! : SETTER

8-down – In great demand : SOUGHTAFTER

12-down – Gilbert and Sullivan opera : IOLANTHE

14-down – Military or political undertaking : CAMPAIGN

15-down – Deter : PUTOFF

17-down – Played in a smooth manner : LEGATO

19-down – Baby carriage : PRAM

20-down – Skin – former British PM : PEEL

1-across – Parent whose children have left home : EMPTYNESTER

7-across – Encroach : TRESPASS

8-across – Part of a Batman costume : CAPE

9-across – From an Asian kingdom : THAI

10-across – Manipulative character in Trilby : SVENGALI

12-across – Critique : REVIEW

15-across – Tidy up : NEATEN

16-across – Sign of approval : THUMBSUP

18-across – Table : DESK

20-across – Chilled : ICED

22-across – Aghast : APPALLED

23-across – Novel focused on the March sisters : LITTLEWOMEN

1-down – Fox’s hole : EARTH

2-down – Negative outlook : PESSIMISM

3-down – Irish poet, d. 1939 : YEATS

4-down – From Asia, say : EASTERN

5-down – Involuntary movement : TIC

6-down – Disgust : REPULSE

11-down – Major tennis or golf tournament : GRANDSLAM

13-down – Morally right : ETHICAL

14-down – Carouse : WASSAIL

17-down – Fleshy North American fruit : PAPAW

19-down – Lustre : SHEEN

21-down – Round mark : DOT

7-across – John Lennon song : IMAGINE

8-across – Civvies : MUFTI

9-across – Rubbish : DROSS

10-across – Go wild : RUNRIOT

11-across – Wealth : AFFLUENCE

14-across – Diamonds : ICE

15-across – Do a winter sport : SKI

16-across – Confused situation : IMBROGLIO

18-across – Italian gangster : MAFIOSO

20-across – Plentiful : AMPLE

22-across – Run off to get married in secret : ELOPE

23-across – Armed robbery : STICKUP

1-down – Decisive blow : KAYO

2-down – Its capital is Jefferson City : MISSOURI

3-down – Middle Eastern capital : TEHRAN

4-down – Portentous sign : OMEN

5-down – Referee, say : OFFICIAL

6-down – Nursery rhyme shepherdess : LITTLEBOPEEP

7-down – A warm autumn : INDIANSUMMER

12-down – Open shoe : FLIPFLOP

13-down – Narcissism : EGOMANIA

17-down – Feed on vegetation : BROWSE

19-down – Comply with : OBEY

21-down – Dad’s Army private – fish : PIKE

1-across – Basin for washing the nether regions : BIDET

4-across – Smart alec – mafioso : WISEGUY

8-across – Serious fall from grace : MORTALSIN

9-across – Impudence : LIP

10-across – Cut – bargain : SNIP

11-across – Seat of government in Holland : THEHAGUE

13-across – Bribe paid to ensure silence : HUSHMONEY

17-across – Bitter alkaloid in drinks which has a stimulant effect : CAFFEINE

19-across – Ski lift : TBAR

21-across – Means to propel a boat : OAR

22-across – Hunch : INTUITION

23-across – Smiled smugly : SMIRKED

24-across – Brutish creature invented by Jonathan Swift : YAHOO

1-down – Puzzle : BEMUSE

2-down – Muslim ascetic known for frenzied dancing : DERVISH

3-down – Kind of jazz harking back to its New Orleans origins : TRAD

4-down – Premier League club : WESTHAMUNITED

5-down – Natural light and heat : SUNSHINE

6-down – Soviet prison camp : GULAG

7-down – That’s wonderful! : YIPPEE

12-down – * : ASTERISK

14-down – Behaving like a hooligan : YOBBISH

15-down – Opposite of ‘down’? : ACROSS

16-down – Insectivorous bird – fool down under : DRONGO

18-down – Italian, Nobel-winning physicist, d. 1954 : FERMI

20-down – Crafty : WILY