This crossword No. 12158 clues and answers were published on Tue 28 Apr 2009 and the puzzle can be visited by following The Guardian Quick Crossword No. 12158 link.
All Across Clues and Answers:
1-across – That which a creditor must accept : LEGALTENDER
9-across – Dismantle : TAKEAPART
10-across – River of eastern England : CAM
11-across – Lizard noted for ability to climb smooth surfaces : GECKO
13-across – Unsurpassed : ALLTIME
14-across – End : FINISH
15-across – Large clippers : SHEARS
18-across – Foolish : IDIOTIC
20-across – European country : SPAIN
21-across – Colour : HUE
22-across – Resolute : STEADFAST
24-across – Extinct flying reptile — protect lady : PTERODACTYL
All Down Clues and Answers:
2-down – Moose : ELK
3-down – Perplexed : ATALOSS
4-down – Sachet for infusion : TEABAG
5-down – Relating to birth — former South African province : NATAL
6-down – Mexican dish : ENCHILADA
7-down – Nervousness in front of audience : STAGEFRIGHT
8-down – Assume character of another — no spare time : IMPERSONATE
12-down – Seasoning : CONDIMENT
16-down – Of a very pious Jewish sect : HASIDIC
17-down – Mortar layer on concrete floor for smooth finish : SCREED
19-down – Gun firing electrified barbs : TASER
23-down – Some : ANY
This crossword has in total 24 where 12 are across and 12 are down.