This crossword No. 9350 clues and answers were published on Thu 20 Apr 2000 and the puzzle can be visited by following The Guardian Quick Crossword No. 9350 link.
All Across Clues and Answers:
1-across – Residue from coal used as fuel : COKE
3-across – Sensational publicity : BALLYHOO
8-across – Gemstone, a variety of chalcedony : ONYX
9-across – Printing type with thick lines : BOLDFACE
11-across – Prehistoric ruin, Salisbury Plain : STONEHENGE
14-across – Sudden : ABRUPT
15-across – Coming : ADVENT
17-across – Credible : BELIEVABLE
20-across – After-effects of too much drinking : HANGOVER
21-across – Soft, creamy cheese : BRIE
22-across – Steadfast : RESOLUTE
23-across – Drop – sin : FALL
All Down Clues and Answers:
1-down – Horizontal beam on goalposts : CROSSBAR
2-down – Musical instrument : KEYBOARD
4-down – Worshipped : ADORED
5-down – Wife of Leofric, an early streaker! : LADYGODIVA
6-down – Pile : HEAY
7-down – Frank : OPEN
10-down – US carnival prize – I poked well : KEWPIEDOLL
12-down – Collections of dried plants : HERBARIA
13-down – Exquisite – as light as air : ETHEREAL
16-down – Summary : DIGEST
18-down – Scorch : CHAR
19-down – Responsibility : ONUS
This crossword has in total 24 where 12 are across and 12 are down.