This crossword No. 11512 clues and answers were published on Sat 31 Mar 2007 and the puzzle can be visited by following The Guardian Quick Crossword No. 11512 link.
All Across Clues and Answers:
1-across – Thirteen : BAKERSDOZEN
9-across – Bias : PREJUDICE
10-across – Stain with colour : DYE
11-across – Split : RIVEN
13-across – Where models parade : CATWALK
14-across – Superior in quality : DELUXE
15-across – Butt up against : ADJOIN
18-across – Word with same meaning : SYNONYM
20-across – Alarm – fascinating woman : SIREN
21-across – Grow older : AGE
22-across – Miscellaneous curios : BRICABRAC
24-across – Still produced by stopping film or video : FREEZEFRAME
All Down Clues and Answers:
2-down – Hatchet : AXE
3-down – Time when day and night are same length : EQUINOX
4-down – Change over – whip : SWITCH
5-down – Unconcealed : OVERT
6-down – Strive – over a nude : ENDEAVOUR
7-down – Substance exciting sexual desire : APHRODISIAC
8-down – Level pegging : NECKANDNECK
12-down – One enlisting of own free will : VOLUNTEER
16-down – Lose hope : DESPAIR
17-down – Arbitrator : UMPIRE
19-down – Person of high rank : NOBLE
23-down – Odd – spirit : RUM
This crossword has in total 24 where 12 are across and 12 are down.