This crossword No. 13157 clues and answers were published on Tue 10 Jul 2012 and the puzzle can be visited by following The Guardian Quick Crossword No. 13157 link.
All Across Clues and Answers:
1-across – Unthinkingly eager : GUNGHO
4-across – Mechanical calculator : ABACUS
8-across – Device used to stun someone temporarily : TASER
9-across – Social blunder : FAUXPAS
10-across – Something joined or added : ADJUNCT
11-across – 24 or 25 sheets of paper : QUIRE
12-across – Small amount given for services rendered : BAKSHEESH
17-across – Stay temporarily : LODGE
19-across – Innate — neither flat nor sharp : NATURAL
21-across – Small antelope : GAZELLE
22-across – Twelve : DOZEN
23-across – Playing : TOYING
24-across – West German Chancellor, 1969-74 : BRANDT
All Down Clues and Answers:
1-down – Rich cake : GATEAU
2-down – Surgery of the face : NOSEJOB
3-down – Wading bird with long legs : HERON
5-down – Curt : BRUSQUE
6-down – Island in the Gulf of Naples : CAPRI
7-down – Ordered scheme : SYSTEM
9-down – It will never happen! : FATCHANCE
13-down – Seat of Russian government : KREMLIN
14-down – As far as one can see : HORIZON
15-down – Insult : SLIGHT
16-down – Celestial body : PLANET
18-down – Giddy — silly : DIZZY
20-down – English royal dynasty : TUDOR
This crossword has in total 26 where 13 are across and 13 are down.