This crossword No. 501 clues and answers were published on Sun 17 Apr 2005 and the puzzle can be visited by following The Guardian Speedy Crossword No. 501 link.
All Across Clues and Answers:
1-across – Table of charges : TARIFF
4-across – Postpone : DELAY
7-across – Wanton destroyer : VANDAL
8-across – Counting device : ABACUS
9-across – Yield : CEDE
10-across – Alienate : ESTRANGE
12-across – Disclaim responsibility : PASSTHEBUCK
17-across – Old and infirm : DECREPIT
19-across – Forearm bone : ULNA
20-across – Joyful : ELATED
21-across – Pass : ELAPSE
22-across – Entice : TEMPT
23-across – Tension, pressure : STRESS
All Down Clues and Answers:
1-down – Buy a better model : TRADEUP
2-down – Make amends for : REDRESS
3-down – Tobacco purifier : FILTERTIP
4-down – Exclude, prohibit : DEBAR
5-down – Succinct, terse : LACONIC
6-down – Previous : YESTER
11-down – Remedy : TREATMENT
13-down – Applaud : ACCLAIM
14-down – Howl, wail : ULULATE
15-down – Movement under stimulus : KINESIS
16-down – Coming : ADVENT
18-down – Act upon : EXERT
This crossword has in total 25 where 13 are across and 12 are down.