This crossword No. 25837 clues and answers were published on Sat 05 Jan 2013 and the puzzle can be visited by following The Guardian Prize Crossword No. 25837 link.
All Across Clues and Answers:
5-across – Insignificant river in 2 : TINPOT
6-across – Strong river in 2 : ROBUST
9-across – Country setter has 2 briefly after 11 : MEXICO
10-across – Repercussions from breaking bow in 2 : BLOWBACK
11-across – Tremendous acceleration in 2 : HUGE
12-across – Controlled strictly, say : REGIMENTED
13-across – Fundamentalist belief of Zionist, sadly beheaded in 2 : CREATIONISM
18-across – Bullied by French beast holding one in 2 : BROWBEATEN
21-across – Vocalisation of friendship, when separated : BARK
22-across – Minor annoyance demands slight reduction of cost in 2 : PINPRICK
23-across – Wanting too much from edition in 2 : GREEDY
24-across – Cover over books of empty talk maybe from 10 : HOTAIR
25-across – Humbug puts silver in 2 : BLAGUE
All Down Clues and Answers:
1-down – Contrive to energise with change of polarity : ENGINEER
2-down – After poisonous gas, look black and go red : COLOUR
3-down – Driver to test the golden isle : MOTORMAN
4-down – South African city bar renovated in 2 : DURBAN
5-down – Bound to be busy : TIEDUP
7-down – Just the thing to let one travel : TICKET
8-down – Married criminal’s misplaced article: take leader off for disastrous decision : ABIGMISTAKE
14-down – Primate’s go slow providing appetiser : APERITIF
15-down – Drown in beer mugs, possibly : SUBMERGE
16-down – Spirit of anger enveloping one : WRAITH
17-down – Crossing game : BRIDGE
19-down – American deer to hand back for Italian one : WAPITI
20-down – Slight problem for horse, say, in river : NIGGLE
This crossword has in total 26 where 13 are across and 13 are down.