This crossword No. 10420 clues and answers were published on Sat 27 Sep 2003 and the puzzle can be visited by following The Guardian Quick Crossword No. 10420 link.
All Across Clues and Answers:
1-across – Person attempting to identify himself with those of a supposedly lower class : INVERTEDSNOB
9-across – Pub drinks dispenser : OPTIC
10-across – Descriptive of the M25 : ORBITAL
11-across – Wharf : QUAY
12-across – Kidnap – Asian city : SHANGHAI
14-across – Spain and Portugal : IBERIA
15-across – Rapidly-inflating car safety device : AIRBAG
18-across – Sledge : TOBOGGAN
20-across – Most important chesspiece : KING
22-across – Lack of harmony : DISCORD
23-across – Sully : TAINT
24-across – Russian composer, 1873-1943 : RACHMANINOFF
All Down Clues and Answers:
2-down – Fertilizer : NITRATE
3-down – Individually : EACH
4-down – Scalp – memento : TROPHY
5-down – Suave : DEBONAIR
6-down – Nick : NOTCH
7-down – London fish market : BILLINGSGATE
8-down – Spanish 16th century adventurer : CONQUISTADOR
13-down – Fungal infection of the skin characterised by round patches : RINGWORM
16-down – Possibly menacing landlord’s agent : BAILIFF
17-down – I’m sorry, could you say that again? : PARDON
19-down – Elementary : BASIC
21-down – Stupefy : STUN
This crossword has in total 24 where 12 are across and 12 are down.