This crossword No. 13121 clues and answers were published on Tue 29 May 2012 and the puzzle can be visited by following The Guardian Quick Crossword No. 13121 link.
All Across Clues and Answers:
1-across – Await and intercept unexpectedly : AMBUSH
4-across – Depressive influence : DAMPER
8-across – Adversary : ENEMY
9-across – Continual routine of hectic competition : RATRACE
10-across – North American bear : GRIZZLY
11-across – Feel about uncertainly : GROPE
12-across – Boisterous fun : HIGHJINKS
17-across – Afterwards : LATER
19-across – Opening : VACANCY
21-across – Clever device attracting attention : GIMMICK
22-across – One of a 15 : STAIR
23-across – Memento of success : TROPHY
24-across – Climb : ASCEND
All Down Clues and Answers:
1-down – Geneva : AVENGE
2-down – Imperfection : BLEMISH
3-down – Soviet spacecraft or rocket : SOYUZ
5-down – It stimulates immune responses — tag nine : ANTIGEN
6-down – Musical instrument : PIANO
7-down – Type of jacket — smoke : REEFER
9-down – Capital of Iceland : REYKJAVIK
13-down – Dress — trimmings : GARNISH
14-down – Capital of New Mexico : SANTAFE
15-down – Air transport — running away : FLIGHT
16-down – Of mixed character : HYBRID
18-down – Pace : TEMPO
20-down – Expenses : COSTS
This crossword has in total 26 where 13 are across and 13 are down.