This crossword No. 9218 clues and answers were published on Wed 17 Nov 1999 and the puzzle can be visited by following The Guardian Quick Crossword No. 9218 link.
All Across Clues and Answers:
1-across – Clergyman : PARISHPRIEST
9-across – Ruminant mammal of Africa : OKAPI
10-across – Be boisterous : ROISTER
11-across – Mirth : GLEE
12-across – Supersonic airliner : CONCORDE
14-across – Try hard : STRIVE
15-across – Highly-spiced sausage : SALAMI
18-across – Hide – cloak : ENSHROUD
20-across – Dimensions : SIZE
22-across – Spare time : LEISURE
23-across – Commerce : TRADE
24-across – London thoroughfare : REGENTSTREET
All Down Clues and Answers:
2-down – Non-professional : AMATEUR
3-down – Goddess of the rainbow : ISIS
4-down – Aversion : HORROR
5-down – Wet weather wear : RAINCOAT
6-down – Go in – set down : ENTER
7-down – Caspar, Melchior and Balthazar : THREEWISEMEN
8-down – Highly enthusiastic revivalist preacher : HOTGOSPELLER
13-down – Capsize : OVERTURN
16-down – Give life to : ANIMATE
17-down – Constraint : DURESS
19-down – Smart – cheat : STING
21-down – Agitate : STIR
This crossword has in total 24 where 12 are across and 12 are down.