This crossword No. 11720 clues and answers were published on Thu 29 Nov 2007 and the puzzle can be visited by following The Guardian Quick Crossword No. 11720 link.
All Across Clues and Answers:
5-across – Book by Monica Ali : BRICKLANE
8-across – Pal : CHUM
9-across – Face etc that can be easily read : OPENBOOK
10-across – Rough and cruel : BRUTAL
11-across – Book by George du Maurier – hat : TRILBY
13-across – Sung by group of singers : CHORAL
15-across – Non-stick coating – evading blame : TEFLON
16-across – Opiate popular in Victorian times : LAUDANUM
18-across – Short time for a wonder : NINE
19-across – Insincere person : HYPOCRITE
All Down Clues and Answers:
1-down – One who stages boxing matches etc : PROMOTER
2-down – See 7 : SCHOOL
3-down – Customer : CLIENT
4-down – Rebuff : SNUB
6-down – Small margin of win : SHORTHEAD
7-down – Book by Thomas Hughes : TOMBROWNS
12-down – Endless : INFINITE
14-down – Capital city : LONDON
15-down – Quality of sound : TIMBRE
17-down – See 7 and 18 : DAYS
This crossword has in total 20 where 10 are across and 10 are down.