This crossword No. 10186 clues and answers were published on Sat 28 Dec 2002 and the puzzle can be visited by following The Guardian Quick Crossword No. 10186 link.
All Across Clues and Answers:
5-across – Stiffener made from sea beast : WHALEBONE
8-across – Cereal crop – hardened skin : CORN
9-across – Sea beast : PORPOISE
10-across – Laura, designer : ASHLEY
11-across – Small boy : NIPPER
13-across – Sea beast with 6 : WALRUS
15-across – US state, North or South : DAKOTA
16-across – Pastoral assistant! : SHEEPDOG
18-across – Sea beast – authenticating mark : SEAL
19-across – Very strict : DRACONIAN
All Down Clues and Answers:
1-down – Dealer in ship’s equipment : CHANDLER
2-down – Type of disk : FLOPPY
3-down – Fairy king : OBERON
4-down – Dismantle – destroy : UNDO
6-down – Facial adornment : MOUSTACHE
7-down – Absolutely necessary : ESSENTIAL
12-down – Asian country : PAKISTAN
14-down – Lead astray : SEDUCE
15-down – Sea beast : DUGONG
17-down – Nobleman : EARL
This crossword has in total 20 where 10 are across and 10 are down.