This crossword No. 12408 clues and answers were published on Tue 16 Feb 2010 and the puzzle can be visited by following The Guardian Quick Crossword No. 12408 link.
All Across Clues and Answers:
1-across – Corrosive fluid : SULPHURICACID
8-across – Metal : TIN
9-across – Therapeutic : MEDICINAL
10-across – One who looks on the bright side : OPTIMIST
11-across – Vehicle fuel oil : DERV
13-across – Withdraw from political union : SECEDE
14-across – One seeking game : HUNTER
16-across – Amiss — distorted : AWRY
17-across – Intrude on another’s property : TRESPASS
20-across – Naval formation : LINEAHEAD
21-across – Greek mount — Gilbertian princess : IDA
22-across – Quality of outweighing other factors etc : PREPONDERANCE
All Down Clues and Answers:
1-down – Brief fight : SETTO
2-down – Extreme members of group : LUNATICFRINGE
3-down – Produced on the premises : HOMEMADE
4-down – Root used in salads : RADISH
5-down – Male bird : COCK
6-down – Focussing : CONCENTRATION
7-down – Bring to its destination — rescue : DELIVER
12-down – One who doesn’t belong : OUTSIDER
13-down – Shellfish — pilgrim badge : SCALLOP
15-down – Mate : FRIEND
18-down – Loop of wire as trap : SNARE
19-down – Circle of : HALO
This crossword has in total 24 where 12 are across and 12 are down.