This crossword No. 11911 clues and answers were published on Fri 11 Jul 2008 and the puzzle can be visited by following The Guardian Quick Crossword No. 11911 link.
All Across Clues and Answers:
1-across – Joint – fit neatly : DOVETAIL
5-across – Sound of a gunshot : BANG
9-across – European capital : PARIS
10-across – Archbishop – monkey, perhaps : PRIMATE
11-across – Silent screen star : BUSTERKEATON
13-across – Irritable : CRABBY
14-across – Front claw : PINCER
17-across – Indiscipline : DISOBEDIENCE
20-across – Within earshot : AUDIBLE
21-across – Without feeling : ICILY
22-across – Christmas : NOEL
23-across – Missing person : ABSENTEE
All Down Clues and Answers:
1-down – Fool – cannabis : DOPE
2-down – Foot wart : VERRUCA
3-down – Child conceived in vitro : TESTTUBEBABY
4-down – Bring into the country : IMPORT
6-down – Modify : ADAPT
7-down – Leaves etc : GREENERY
8-down – Emergency number! : NINENINENINE
12-down – Pollution from the sky : ACIDRAIN
15-down – Person on a two-wheeler : CYCLIST
16-down – Word that modifies another : ADVERB
18-down – Walk obliquely : SIDLE
19-down – Cheeky kid : TYKE
This crossword has in total 24 where 12 are across and 12 are down.