This crossword No. 11522 clues and answers were published on Thu 12 Apr 2007 and the puzzle can be visited by following The Guardian Quick Crossword No. 11522 link.
All Across Clues and Answers:
5-across – Mammal with protective plates : ARMADILLO
8-across – Become member of : JOIN
9-across – Knightly principles : CHIVALRY
10-across – Unnerve – baby’s plaything : RATTLE
11-across – Lying on one’s back : SUPINE
13-across – Express disapproval : OBJECT
15-across – Coterie : CLIQUE
16-across – Clothing industry : RAGTRADE
18-across – Melt : THAW
19-across – Mammal with pointed quills : PORCUPINE
All Down Clues and Answers:
1-down – Dark-haired woman : BRUNETTE
2-down – Awkward in manner, tactless : GAUCHE
3-down – The Dog Star : SIRIUS
4-down – Bone of forearm : ULNA
6-down – Largest carnivorous land mammal : POLARBEAR
7-down – Anthropoid mammal of Indonesia : ORANGUTAN
12-down – Unspoilt : PRISTINE
14-down – Roof with reeds etc : THATCH
15-down – Causing fear : CREEPY
17-down – Ancient city associated with a wooden horse : TROY
This crossword has in total 20 where 10 are across and 10 are down.