This crossword No. 12639 clues and answers were published on Fri 12 Nov 2010 and the puzzle can be visited by following The Guardian Quick Crossword No. 12639 link.
All Across Clues and Answers:
1-across – Bring into use : DEPLOY
4-across – Plant louse : APHID
7-across – Drinking cup : GOBLET
8-across – Heavy and filling : STODGY
9-across – Needy : POOR
10-across – Train : EXERCISE
12-across – Disposition : TEMPERAMENT
17-across – Lad hopes : ASPHODEL
19-across – Unpleasantly messy substance : GUNK
20-across – Perfect place : UTOPIA
21-across – Despicable person : TOERAG
22-across – Groom : PREEN
23-across – Inclined : TENDED
All Down Clues and Answers:
1-down – Student who fails to complete a college course : DROPOUT
2-down – Traveller to a holy place : PILGRIM
3-down – Recovering : ONTHEMEND
4-down – Dramatic artist : ACTOR
5-down – Roman emperor who visited Britain : HADRIAN
6-down – English poet, d. 1700 : DRYDEN
11-down – Ornamental shoulder piece on clothing : EPAULETTE
13-down – Go off : EXPLODE
14-down – Brainbox : EGGHEAD
15-down – Drinking vessel : TANKARD
16-down – Raise the price of a house after agreeing a lower price : GAZUMP
18-down – Pungent edible bulb of the lily family : ONION
This crossword has in total 25 where 13 are across and 12 are down.