This crossword No. 11574 clues and answers were published on Tue 12 Jun 2007 and the puzzle can be visited by following The Guardian Quick Crossword No. 11574 link.
All Across Clues and Answers:
1-across – Frustrate : THWART
4-across – Horrified : AGHAST
8-across – Sustained bombing attack : BLITZ
9-across – Make trivial objections : QUIBBLE
10-across – Source of acorns : OAKTREE
11-across – Remove undesirable elements : PURGE
12-across – Not the same : DIFFERENT
17-across – List of contents in book : INDEX
19-across – Very many : UMPTEEN
21-across – Liquid vegetable-based dish : PEASOUP
22-across – Paved eating area adjoining house : PATIO
23-across – Carry : CONVEY
24-across – Mourn : GRIEVE
All Down Clues and Answers:
1-down – In addition : TOBOOT
2-down – Young outstandingly successful person : WHIZKID
3-down – Shaving implement : RAZOR
5-down – Momentary sighting : GLIMPSE
6-down – Yellowish fossil resin : AMBER
7-down – Wigwam : TEEPEE
9-down – Push in ahead of one’s turn : QUEUEJUMP
13-down – Small protective entrenchment : FOXHOLE
14-down – Braced support : TRESTLE
15-down – Film based on famous person’s life : BIOPIC
16-down – Nap : SNOOZE
18-down – Depicted – haggard : DRAWN
20-down – Thin material used for writing, wrapping etc : PAPER
This crossword has in total 26 where 13 are across and 13 are down.