This crossword No. 23831 clues and answers were published on Sat 29 Jul 2006 and the puzzle can be visited by following The Guardian Prize Crossword No. 23831 link.
All Across Clues and Answers:
9-across – Pipe stuffed with opium, as seen on TV : UPPOMPEII
10-across – Cat and what it will do on seeing mouse with no head : OUNCE
11-across – See 23 : FROMTHE
12-across – Much earlier expanded silver ring : LONGAGO
13-across – Fuel substance : COKE
14-across – Unbiased, thinking in terms of swings and roundabouts? : FAIRMINDED
16-across – Issue not allowed? Now look here! : OUTCOME
17-across – Divorce? Get ready to take your horse away : UNHITCH
19-across – Hand to retreating crowd inside to get hold of an incendiary device : NAPALMBOMB
22-across – State force to secure a bit of an iceberg : CALF
24-across – One site associated oracularly with Apollo Theatre : ADELPHI
25-across – One who scored four times in a year with three short women : VIVALDI
26-across – Palpitate and pong during flipping exercise : THUMP
27-across – Enlivening drink taken with, say, backing band : GINGERING
All Down Clues and Answers:
1-down – They’ll accept a gamble, giving territory report to social workers : TURFACCOUNTANTS
2-down – Price, in electrical outlet, of an engaging piece of machinery : SPROCKET
3-down – Hit song’s opening spot : SMOTE
4-down – See 6 : SERENADE
5-down – Daisy possibly married – no better afterwards : MILLER
6-down – Do another job: be a romantic singer of 5’s theme song : MOONLIGHT
7-down – Surrounded by light, though not by the sea : INLAND
8-down – Where the forehead may be found?, as 5 co-wrote : BEYONDTHEFRINGE
15-down – Suckers, those who enjoy these popular pieces : LOLLIPOPS
17-down – Stopped being a failure as a tear-jerker : UNMOVING
18-down – Lacking a true stem, roots or leaves, it’ll do for cultivation : THALLOID
20-down – Once put in an extra one of 5’s trilogy : PLEXUS
21-down – See 23 : BRIDGE
23-down – Work of 5, as seen through a ship’s captain’s eyes? : AVIEW
This crossword has in total 28 where 14 are across and 14 are down.