This crossword No. 11790 clues and answers were published on Thu 21 Feb 2008 and the puzzle can be visited by following The Guardian Quick Crossword No. 11790 link.
All Across Clues and Answers:
5-across – Many-legged creepy-crawly : CENTIPEDE
8-across – Large brass instrument : TUBA
9-across – In no prearranged order : ATRANDOM
10-across – Rigorous : STRICT
11-across – Fleet of warships : ARMADA
13-across – Ditch dug as fortification : TRENCH
15-across – Younger – subordinate : JUNIOR
16-across – Implement for plucking strings : PLECTRUM
18-across – Difficult piece of work : TASK
19-across – Large furry flying insect : BUMBLEBEE
All Down Clues and Answers:
1-down – Kinsman or kinswoman : RELATION
2-down – Finally : ATLAST
3-down – Ancient Greek city synonymous with austerity : SPARTA
4-down – Norse god : ODIN
6-down – Insect with large, usually brightly coloured, wings : BUTTERFLY
7-down – Damp-loving creepy-crawly : WOODLOUSE
12-down – Wandering musician of old : MINSTREL
14-down – As a result of this : HEREBY
15-down – Knitwear – bounder : JUMPER
17-down – Association for people with common interest : CLUB
This crossword has in total 20 where 10 are across and 10 are down.