This crossword No. 12750 clues and answers were published on Wed 23 Mar 2011 and the puzzle can be visited by following The Guardian Quick Crossword No. 12750 link.
All Across Clues and Answers:
1-across – He checked observance of blackout regulations : AIRRAIDWARDEN
8-across – Order — offer : BID
9-across – Going on for ever : PERPETUAL
10-across – Unpredictable sort of person : MAVERICK
11-across – Siamese : THAI
13-across – Refined : POLITE
14-across – Fast moving : SPEEDY
16-across – Imitate : COPY
17-across – Needlework : KNITTING
20-across – Dock worker : STEVEDORE
21-across – Sign of the zodiac : LEO
22-across – Safely positioned : OUTOFHARMSWAY
All Down Clues and Answers:
1-down – Item of music released : ALBUM
2-down – Production of new buildings etc for area : REDEVELOPMENT
3-down – Aim at — desire greatly : ASPIRETO
4-down – Show where to go — straight : DIRECT
5-down – Old : AGED
6-down – Son’s wife : DAUGHTERINLAW
7-down – Invalidate : NULLIFY
12-down – Towards the source : UPSTREAM
13-down – Spanish painter, d. 1973 : PICASSO
15-down – : ANGORA
18-down – Renown : GLORY
19-down – Villein : SERF
This crossword has in total 24 where 12 are across and 12 are down.