This crossword No. 826 clues and answers were published on Sun 17 Jul 2011 and the puzzle can be visited by following The Guardian Speedy Crossword No. 826 link.
All Across Clues and Answers:
1-across – Cash register : TILL
3-across – Causing to feel self-conscious : ABASHING
8-across – Drink made of fermented honey and water : MEAD
9-across – Loose material worn away from rocks : DETRITUS
11-across – Gain distinction : WINONESSPURS
13-across – Placental mammal having a single pair of incisor, ‘gnawing’, teeth : RODENT
14-across – Incarcerate : ENTOMB
17-across – Accepts a new idea or piece of advice : TAKESONBOARD
20-across – Open clue? : OPULENCE
21-across – Riviera resort locals call ‘La Cote d’Azur’ : NICE
22-across – Subatomic particle : ELECTRON
23-across – Single undivided entity : UNIT
All Down Clues and Answers:
1-down – Imaginary distortion of space which allows travel to different periods : TIMEWARP
2-down – Erudite : LEARNED
4-down – Outer thorax : BREAST
5-down – Barely managing : SCRAPINGBY
6-down – Put into the ground : INTER
7-down – Long cut : GASH
10-down – No matter what : INANYEVENT
12-down – Acquiescent : OBEDIENT
15-down – Power of speech : ORATION
16-down – Blanket-like cloak with a hole in the centre for the head : PONCHO
18-down – Divert : AMUSE
19-down – Ossified material : BONE
This crossword has in total 24 where 12 are across and 12 are down.