This crossword No. 9999 clues and answers were published on Wed 22 May 2002 and the puzzle can be visited by following The Guardian Quick Crossword No. 9999 link.
All Across Clues and Answers:
1-across – Chip in – supply : CONTRIBUTE
7-across – Day set aside for celebration : FESTIVAL
8-across – Skin problem : ACNE
9-across – Certain : SURE
10-across – One abstaining from worldly comforts : ASCETIC
12-across – Warlike : BELLIGERENT
14-across – Crime : OFFENCE
16-across – Thin sheet of metal : LEAF
19-across – Slashing knife : KRIS
20-across – Stab Cleo : OBSTACLE
21-across – Blowfly : BLUEBOTTLE
All Down Clues and Answers:
1-down – Plant used in salads : CRESS
2-down – Unaffected : NATURAL
3-down – Enthusiastically favourable review : RAVE
4-down – Set of posts supporting a rail : BALUSTER
5-down – Element : TRACE
6-down – Maintain : INSIST
11-down – Reveal : DISCLOSE
12-down – Previously ? in front : BEFORE
13-down – Graceful : ELEGANT
15-down – Artist’s stand : EASEL
17-down – Misleading : FALSE
18-down – Capital of Norway : OSLO
This crossword has in total 23 where 11 are across and 12 are down.