This crossword No. 456 clues and answers were published on Sun 13 Jun 2004 and the puzzle can be visited by following The Guardian Speedy Crossword No. 456 link.
All Across Clues and Answers:
5-across – Fund : BEARTHECOST
7-across – Monster : OGRE
8-across – Laboratory instrument : TESTTUBE
9-across – Good-natured : AFFABLE
11-across – Peg used in joinery : DOWEL
13-across – Seize forcibly : WREST
14-across – Site of unpredictable volcanic activity : HOTSPOT
16-across – Desert arachnid : SCORPION
17-across – Entertain regally : FETE
18-across – Edible root of the Americas : SWEETPOTATO
All Down Clues and Answers:
1-down – Exceptional : RARE
2-down – Majestic : STATELY
3-down – Belief in a god from reason not revelation : DEISM
4-down – Serpentine : TORTUOUS
5-down – Set of ingenious plans : BAGOFTRICKS
6-down – Romantic dinner, for example : TABLEFORTWO
10-down – Motley : ASSORTED
12-down – Rely upon : COUNTON
15-down – Abandons : JILTS
17-down – Young of a horse : FOAL
This crossword has in total 20 where 10 are across and 10 are down.