This crossword No. 13179 clues and answers were published on Sat 04 Aug 2012 and the puzzle can be visited by following The Guardian Quick Crossword No. 13179 link.
All Across Clues and Answers:
1-across – Start fighting : COMETO
4-across – See 1 : BLOWS
7-across – Dealer : TRADER
8-across – Berthing area for yachts : MARINA
9-across – Comms code for M : MIKE
10-across – Reduction — long wire : LOWERING
12-across – Acts of warfare : HOSTILITIES
17-across – Mountainous region of south central France : AUVERGNE
19-across – In place of — depravity : VICE
20-across – Sewers : DRAINS
21-across – Come to light : ARISEN
22-across – Proverbial constituent of our moon : GREEN
23-across – See 22 : CHEESE
All Down Clues and Answers:
1-down – Rich son : CORNISH
2-down – Insanity : MADNESS
3-down – Hair-raising : THRILLING
4-down – Fire : BLAZE
5-down – Combine chemically with a particular gas — ie six do : OXIDISE
6-down – Unkempt : SHAGGY
11-down – Cover up — wall coating : WHITEWASH
13-down – Do away with : OBVIATE
14-down – Statement of account : INVOICE
15-down – Hide away : SECRETE
16-down – Small pet — sycophant : LAPDOG
18-down – Argument : RUNIN
This crossword has in total 25 where 13 are across and 12 are down.