This crossword No. 12515 clues and answers were published on Mon 21 Jun 2010 and the puzzle can be visited by following The Guardian Quick Crossword No. 12515 link.
All Across Clues and Answers:
1-across – Use of sudden violence to achieve ends : SHOCKTACTICS
9-across – Mistake : ERROR
10-across – Balkan country : ROMANIA
11-across – Animal in zodiac : GOAT
12-across – Of necessity : PERFORCE
14-across – Make unhappy : SADDEN
15-across – Stand for camera etc : TRIPOD
18-across – Linked : ATTACHED
20-across – Love god : EROS
22-across – Nuclear device : REACTOR
23-across – At liberty : LOOSE
24-across – Person or thing impossible to catch : WILLOTHEWISP
All Down Clues and Answers:
2-down – US university : HARVARD
3-down – Short and abrupt : CURT
4-down – Thing to aim at : TARGET
5-down – Social centre for scouts etc : CAMPFIRE
6-down – Ring next to the bullseye : INNER
7-down – 2001 : SPACEODYSSEY
8-down – Small European songbird : HEDGESPARROW
13-down – Omit cure : MERCUTIO
16-down – People : PERSONS
17-down – Fireside : HEARTH
19-down – Lag behind : TRAIL
21-down – Talon : CLAW
This crossword has in total 24 where 12 are across and 12 are down.