This crossword No. 9528 clues and answers were published on Tue 14 Nov 2000 and the puzzle can be visited by following The Guardian Quick Crossword No. 9528 link.
All Across Clues and Answers:
1-across – South American vegetable : SWEETPOTATO
9-across – Drinker behaving antisocially : LAGERLOUT
10-across – Expanse of water : SEA
11-across – Repeating series : CYCLE
13-across – Ruined abbey on the Wye : TINTERN
14-across – Having an end : FINITE
15-across – Nape – untidy person : SCRUFF
18-across – Frozen floating object : ICEFLOE
20-across – Fundamental : BASIC
21-across – Grain – whiskey : RYE
22-across – Awareness – regard : ATTENTION
24-across – Surreptitious : CLANDESTINE
All Down Clues and Answers:
2-down – Hairpiece : WIG
3-down – Serious-minded : EARNEST
4-down – Immediately : PRONTO
5-down – Person of heroic stature : TITAN
6-down – Sensory organs on the tongue : TASTEBUDS
7-down – Dominicans : BLACKFRIARS
8-down – Splendid : MAGNIFICENT
12-down – Large slippery fish : CONGEREEL
16-down – Cupboard – ministers : CABINET
17-down – Water heater : KETTLE
19-down – Acquire knowledge : LEARN
23-down – Hostelry : INN
This crossword has in total 24 where 12 are across and 12 are down.