This crossword No. 9188 clues and answers were published on Wed 13 Oct 1999 and the puzzle can be visited by following The Guardian Quick Crossword No. 9188 link.
All Across Clues and Answers:
1-across – Ill : SICK
3-across – After-effect of drinking spree : HANGOVER
8-across – Yield – supply : GIVE
9-across – Sacrifice to deity : OFFERING
11-across – Deign : CONDESCEND
14-across – Dread : TERROR
15-across – Lowest part : BOTTOM
17-across – Insure plan : PENINSULAR
20-across – Stress : EMPHASIS
21-across – Eucharist : MASS
22-across – Cut short : ABRIDGED
23-across – English public school : ETON
All Down Clues and Answers:
1-down – Wisdom : SAGACITY
2-down – City devastated in World War II : COVENTRY
4-down – Influence : AFFECT
5-down – Glass building for rearing plants : GREENHOUSE
6-down – Conceited – futile : VAIN
7-down – Terrible temper : RAGE
10-down – Earlier : BEFOREHAND
12-down – Staunch : STALWART
13-down – Put in jail : IMPRISON
16-down – Godlike : DIVINE
18-down – A queen of Sparta : LEDA
19-down – Projection : SPUR
This crossword has in total 24 where 12 are across and 12 are down.