This crossword No. 10588 clues and answers were published on Tue 13 Apr 2004 and the puzzle can be visited by following The Guardian Quick Crossword No. 10588 link.
All Across Clues and Answers:
1-across – Self-important public servant : JACKINOFFICE
9-across – Horse : RIDER
10-across – Crimson : CARMINE
11-across – Preposition : UPON
12-across – In an impassive manner : STOLIDLY
14-across – Part of foot : INSTEP
15-across – Keen insight : ACUMEN
18-across – Sail – find one’s way : NAVIGATE
20-across – The shivers : AGUE
22-across – Summarily and illegally killed : LYNCHED
23-across – Moral atmosphere : ETHOS
24-across – Continuing student : POSTGRADUATE
All Down Clues and Answers:
2-down – Difficult : ARDUOUS
3-down – Edge of pavement : KERB
4-down – Precision : NICETY
5-down – It was touched in servility : FORELOCK
6-down – Greek epic : ILIAD
7-down – The rest of the world : EVERYONEELSE
8-down – Mistake revealing hidden concerns : FREUDIANSLIP
13-down – Prickly creature : HEDGEHOG
16-down – Passport photograph? : MUGSHOT
17-down – Sports grounds : STADIA
19-down – Planet : VENUS
21-down – Lover – dandy : BEAU
This crossword has in total 24 where 12 are across and 12 are down.