This crossword No. 529 clues and answers were published on Sun 30 Oct 2005 and the puzzle can be visited by following The Guardian Speedy Crossword No. 529 link.
All Across Clues and Answers:
1-across – Word puzzle using first letters : ACROSTIC
5-across – Propose : MOOT
9-across – Poplar tree : ASPEN
10-across – Shortest route : BEELINE
11-across – Establish lines of communication : BUILDBRIDGES
13-across – Drowsy : SLEEPY
14-across – Cover with plaster : RENDER
17-across – Inquisitor : INTERROGATOR
20-across – Versus : AGAINST
21-across – Clumsy : INEPT
22-across – Reverberate : ECHO
23-across – Fawning, false praise : FLATTERY
All Down Clues and Answers:
1-down – Half open : AJAR
2-down – Bliss : RAPTURE
3-down – Unmarried mother? : SINGLEPARENT
4-down – Drink : IMBIBE
6-down – Due : OWING
7-down – Hold dear, prize : TREASURE
8-down – Student of the Middle Ages : MEDIAEVALIST
12-down – Pronounce with full breath : ASPIRATE
15-down – Ecclesiastical see : DIOCESE
16-down – Imposing doorway : PORTAL
18-down – Educate : TEACH
19-down – Remain : STAY
This crossword has in total 24 where 12 are across and 12 are down.