This crossword No. 11169 clues and answers were published on Wed 22 Feb 2006 and the puzzle can be visited by following The Guardian Quick Crossword No. 11169 link.
All Across Clues and Answers:
1-across – See 12 and 20 : COMBUSTION
7-across – WWII portable automatic weapon : TOMMYGUN
8-across – Clothing : GARB
9-across – Long – tree : PINE
10-across – Composer of The Bartered Bride : SMETANA
12-across – Cause of Mr Krook’s death : SPONTANEOUS
14-across – Denigrate : BLACKEN
16-across – Glass ball : BEAD
19-across – Worry : FRET
20-across – Cause of engine power : INTERNAL
21-across – Extraordinary : PHENOMENAL
All Down Clues and Answers:
1-down – Complaint of small children : CROUP
2-down – Souvenir : MEMENTO
3-down – Impel : URGE
4-down – Building containing several dwellings : TENEMENT
5-down – Have an obligation : OUGHT
6-down – Flowering tree : PRUNUS
11-down – Greek : ATHENIAN
12-down – Wage : SALARY
13-down – Conquer – go on too long : OVERRUN
15-down – Apprehend – funny song : CATCH
17-down – Speak slowly and affectedly : DRAWL
18-down – Small particle : ATOM
This crossword has in total 23 where 11 are across and 12 are down.