This crossword No. 12778 clues and answers were published on Mon 25 Apr 2011 and the puzzle can be visited by following The Guardian Quick Crossword No. 12778 link.
All Across Clues and Answers:
1-across – Early years : CHILDHOOD
8-across – Giving out a steady light : AGLOW
9-across – Surgical pincers? : FORCEPS
10-across – Wanting : DESIROUS
11-across – English architect, d. 1723 : WREN
13-across – Continue to annoy : RANKLE
14-across – Fencing call : TOUCHE
16-across – Bound along : LOPE
17-across – South American bird with loud, harsh cry : SCREAMER
19-across – Islamic state : EMIRATE
20-across – Edouard ___, painted Déjeuner sur l’herbe, d. 1883 : MANET
21-across – In the red : OVERDRAWN
All Down Clues and Answers:
1-down – Yellow : COWARDLY
2-down – Arrival in large numbers : INFLUX
3-down – Black, perhaps — night : DARK
4-down – Very basic obsession? : ONETRACKMIND
5-down – Go to pieces : DISINTEGRATE
6-down – Bullfighter who uses darts : BANDERILLERO
7-down – Value of a stockmarket share at the end of a day : CLOSINGPRICE
12-down – Scary personification? : BOGEYMAN
15-down – Skin complaint : ECZEMA
18-down – Beach grains : SAND
This crossword has in total 22 where 12 are across and 10 are down.