This crossword No. 10991 clues and answers were published on Thu 28 Jul 2005 and the puzzle can be visited by following The Guardian Quick Crossword No. 10991 link.
All Across Clues and Answers:
1-across – Sill of house door : THRESHOLD
8-across – Pollsters : MORI
9-across – Pierce : PENETRATE
10-across – Box in training – nautical pole : SPAR
13-across – Obscure : CLOUD
15-across – Reaper’s implement : SCYTHE
16-across – Evening meal : SUPPER
17-across – Improve the quality of : ENRICH
19-across – Canoodle : SMOOCH
20-across – Pool of bets in gambling : KITTY
21-across – Nob : TOFF
24-across – Exciting series of events : ADVENTURE
25-across – Transparent face cover : VEIL
26-across – Cider and lager – it could be poisonous : SNAKEBITE
All Down Clues and Answers:
2-down – Pay close attention to : HEED
3-down – Flat : EVEN
4-down – Barrier leapt in race : HURDLE
5-down – Substance used to distinguish between acid and alkali : LITMUS
6-down – Utensil for consuming consomme : SOUPSPOON
7-down – System arranged in successive grades : HIERARCHY
11-down – Confident in promoting one’s own views : ASSERTIVE
12-down – Vessel that rides up on fixed vane or vanes : HYDROFOIL
13-down – Throw : CHUCK
14-down – Baby’s comforter : DUMMY
18-down – Concealed : HIDDEN
19-down – Sudden flash – run naked in public : STREAK
22-down – Pierce with pointed weapon : STAB
23-down – Ill-mannered child : BRAT
This crossword has in total 28 where 14 are across and 14 are down.