This crossword No. 811 clues and answers were published on Sun 03 Apr 2011 and the puzzle can be visited by following The Guardian Speedy Crossword No. 811 link.
All Across Clues and Answers:
1-across – Try : ATTEMPT
8-across – Nuclear energy producer : REACTOR
9-across – Tough flexible tissue : GRISTLE
10-across – Foretell : PREDICT
11-across – Topic, leitmotif : THEME
13-across – Scene of Magna Carta’s signing : RUNNYMEDE
15-across – Clan leader : CHIEFTAIN
18-across – Eat greedily : GORGE
21-across – Infected cavity : ABSCESS
22-across – Affecting, moving : EMOTIVE
23-across – Go on too long : OVERRUN
24-across – Occupancy : TENANCY
All Down Clues and Answers:
1-down – Jargon, patois : ARGOT
2-down – String, cord : TWINE
3-down – Nacre : MOTHEROFPEARL
4-down – Cranial surgical instrument : TREPAN
5-down – Accept tamely : TAKELYINGDOWN
6-down – Conflict : STRIFE
7-down – Squirm : WRITHE
12-down – Quieten : HUSH
14-down – Animal excrement : DUNG
15-down – Coloured pencil : CRAYON
16-down – Part of the foot : INSTEP
17-down – Agreement : ASSENT
19-down – Rule : REIGN
20-down – Each, all : EVERY
This crossword has in total 26 where 12 are across and 14 are down.