This crossword No. 11778 clues and answers were published on Thu 07 Feb 2008 and the puzzle can be visited by following The Guardian Quick Crossword No. 11778 link.
All Across Clues and Answers:
1-across – Sheer cliff : PRECIPICE
8-across – Impetuous : RASH
9-across – Supreme : PARAMOUNT
10-across – Healthy – source of water : WELL
13-across – Minute unit of visual display : PIXEL
15-across – Curving outwards : CONVEX
16-across – Legally granted principles due to person : RIGHTS
17-across – Make wealthy : ENRICH
19-across – French engineer famed for tower : EIFFEL
20-across – Planets composer : HOLST
21-across – Appear : SEEM
24-across – Unsymmetrical : IRREGULAR
25-across – Surprise attack : RAID
26-across – Start to grow – a regiment : GERMINATE
All Down Clues and Answers:
2-down – Highway : ROAD
3-down – Applaud : CLAP
4-down – Long-winded : PROLIX
5-down – Horse chestnut : CONKER
6-down – : MAKESHIFT
7-down – Business of supplying retailers : WHOLESALE
11-down – Supplementary item : ACCESSORY
12-down – Vigorous : ENERGETIC
13-down – Rod on which bird roosts : PERCH
14-down – Restrict : LIMIT
18-down – Husky : HOARSE
19-down – Regard highly : ESTEEM
22-down – Revolve – go off : TURN
23-down – Floating platform of logs, planks, etc : RAFT
This crossword has in total 28 where 14 are across and 14 are down.