This crossword No. 12107 clues and answers were published on Fri 27 Feb 2009 and the puzzle can be visited by following The Guardian Quick Crossword No. 12107 link.
All Across Clues and Answers:
1-across – Without preparation — unconventional : OFFTHEWALL
7-across – In the vicinity : NEARHERE
8-across – Pound — defeat : BEAT
9-across – Over again : ANEW
10-across – Artwork formed from scraps of paper, photos etc : COLLAGE
12-across – Social gathering : GETTOGETHER
14-across – Nauseous when flying : AIRSICK
16-across – Adjustable part of wing — panic : FLAP
19-across – Spice — club : MACE
20-across – Increase rapidly in size — advocaat and lemonade : SNOWBALL
21-across – Supposed PR expert : SPINDOCTOR
All Down Clues and Answers:
1-down – Musical drama : OPERA
2-down – Zealous : FERVENT
3-down – Pay attention to : HEED
4-down – Express grief about : WEEPOVER
5-down – Defame in writing : LIBEL
6-down – Knife for stabbing : DAGGER
11-down – Soft leather shoe — venomous snake : MOCCASIN
12-down – Stringed instrument : GUITAR
13-down – Utah lib : HALIBUT
15-down – Precipitous : STEEP
17-down – Arctic or antarctic : POLAR
18-down – Proverbially extinct bird : DODO
This crossword has in total 23 where 11 are across and 12 are down.