This crossword No. 11403 clues and answers were published on Wed 22 Nov 2006 and the puzzle can be visited by following The Guardian Quick Crossword No. 11403 link.
All Across Clues and Answers:
1-across – External rendering with small stones : PEBBLEDASH
7-across – Supposed – tie up vat : PUTATIVE
8-across – Charge a gun : LOAD
9-across – Infant : BABY
10-across – Bituminous material for roofing, paths etc : ASPHALT
12-across – Run-of-the-mill : BOGSTANDARD
14-across – Ingredient of porridge : OATMEAL
16-across – Make snake-like noise : HISS
19-across – Plant with fronds : FERN
20-across – Joining non-adjacent corners : DIAGONAL
21-across – Shabby : THREADBARE
All Down Clues and Answers:
1-down – Exactly – perpendicular : PLUMB
2-down – Large cushion filled with granules : BEANBAG
3-down – Cut of meat from between rib and haunch : LOIN
4-down – Sauce for salad etc : DRESSING
5-down – Slender, graceful girl : SYLPH
6-down – Song : BALLAD
11-down – Have one leg on each side of : STRADDLE
12-down – Boldly impudent : BRAZEN
13-down – US state containing the Grand Canyon : ARIZONA
15-down – Division of year : MONTH
17-down – Sedimentary clay rock, which may contain oil : SHALE
18-down – Unclenched fist : HAND
This crossword has in total 23 where 11 are across and 12 are down.