This crossword No. 9410 clues and answers were published on Thu 29 Jun 2000 and the puzzle can be visited by following The Guardian Quick Crossword No. 9410 link.
All Across Clues and Answers:
1-across – Aquatic mammal : SEACOW
4-across – Groom : OSTLER
8-across – Huge : LARGE
9-across – Naval officer sitting on Admiralty Board : SEALORD
10-across – Eat, lass! : SEASALT
11-across – Fat : OBESE
12-across – Marine invertebrate with spikes : SEAURCHIN
17-across – Crest : RIDGE
19-across – Embankment serving as a breakwater : SEAWALL
21-across – A gull, for instance : SEABIRD
22-across – Glossy : SHINY
23-across – Weever fish : SEACAT
24-across – Neptune or Poseidon : SEAGOD
All Down Clues and Answers:
1-down – Display prominently : SPLASH
2-down – Amount unpaid : ARREARS
3-down – Last letter in Greek alphabet : OMEGA
5-down – Lake-like arm of salt water in Scotland : SEALOCH
6-down – Lax : LOOSE
7-down – Narrow arm of the Indian Ocean – erased : REDSEA
9-down – Held up to ridicule : SATIRISED
13-down – The USA : AMERICA
14-down – Approaching : NEARING
15-down – Turning point in illness : CRISIS
16-down – Toyed – used an instrument : PLAYED
18-down – Theatrical production : DRAMA
20-down – Passage between seats : AISLE
This crossword has in total 26 where 13 are across and 13 are down.