This crossword No. 807 clues and answers were published on Sun 06 Mar 2011 and the puzzle can be visited by following The Guardian Speedy Crossword No. 807 link.
All Across Clues and Answers:
1-across – Hold answerable : CALLTOACCOUNT
8-across – Remain : STAY
9-across – Unaccompanied part song : MADRIGAL
10-across – Teenager : ADOLESCENT
12-across – Tension : STRESS
14-across – Railway marshalling area : SIDING
15-across – Popular vote : PLEBISCITE
19-across – Interior : INTERNAL
20-across – Cook : CHEF
21-across – Short-lived success : FLASHINTHEPAN
All Down Clues and Answers:
2-down – Counteracting remedy : ANTIDOTE
3-down – Faithful : LOYAL
4-down – Diffusion of liquid through porous membrane : OSMOSIS
5-down – Nucleus, framework : CADRE
6-down – Left out : OMITTED
7-down – Close by : NEAR
11-down – Abomination, bugbear : ANATHEMA
13-down – Put into words : EXPRESS
14-down – Frying pan : SKILLET
16-down – Boredom : ENNUI
17-down – Secret hiding place : CACHE
18-down – Blue dye : ANIL
This crossword has in total 22 where 10 are across and 12 are down.