This crossword No. 9566 clues and answers were published on Sat 30 Dec 2000 and the puzzle can be visited by following The Guardian Quick Crossword No. 9566 link.
All Across Clues and Answers:
1-across – Acknowledged beneficiary : HEIR
3-across – See 1 : APPARENT
8-across – Oppose Ñ US dollar : BUCK
9-across – Physical prevention of access : BLOCKADE
11-across – Women : THEFAIRSEX
14-across – Work with Ñ help : ASSIST
15-across – Road avoiding crowded centres : BYPASS
17-across – Thyroid cartilage : ADAMSAPPLE
20-across – Retrieval : RECOVERY
21-across – Flightless New Zealand bird : KIWI
22-across – Frustrated : THWARTED
23-across – Merely : ONLY
All Down Clues and Answers:
1-down – Customary : HABITUAL
2-down – Become greater in number : INCREASE
4-down – Worthless : PALTRY
5-down – Classic Ñ chapel tray : ARCHETYPAL
6-down – Round, yellow cheese : EDAM
7-down – Long, difficult journey : TREX
10-down – Disregarded : PASSEDOVER
12-down – Crusade : CAMPAIGN
13-down – Harshness : ASPERITY
16-down – Rise to notice : EMERGE
18-down – Bar on fingerboard of guitar : FRET
19-down – Unpowered barge : SCOW
This crossword has in total 24 where 12 are across and 12 are down.