This crossword No. 9966 clues and answers were published on Sat 13 Apr 2002 and the puzzle can be visited by following The Guardian Quick Crossword No. 9966 link.
All Across Clues and Answers:
1-across – One who entertains : HOST
3-across – Killer : ASSASSIN
9-across – Falls : NIAGARA
10-across – Transfer of tissue – hard work! : GRAFT
11-across – Raw vegetables, etc : SALAD
12-across – Solitary religious : HERMIT
14-across – Less than nothing : MINUSQUANTITY
17-across – Set out on journey : EMBARK
19-across – Difficult problem : POSER
22-across – Big house – police district : MANOR
23-across – Most of it is below the surface : ICEBERG
24-across – Study of God, etc : THEOLOGY
25-across – Portent : OMEN
All Down Clues and Answers:
1-down – Good-looking : HANDSOME
2-down – Slow-moving creature : SNAIL
4-down – Full of exciting adventures : SWASHBUCKLING
5-down – Bode : AUGUR
6-down – African language : SWAHILI
7-down – Short record or letter : NOTE
8-down – : CADDIS
13-down – Lightest and most abundant of all substances : HYDROGEN
15-down – Candidate – appointed person : NOMINEE
16-down – Small boy : NIPPER
18-down – Month : APRIL
20-down – Source of power : STEAM
21-down – : SMUT
This crossword has in total 26 where 13 are across and 13 are down.