This crossword No. 11787 clues and answers were published on Mon 18 Feb 2008 and the puzzle can be visited by following The Guardian Quick Crossword No. 11787 link.
All Across Clues and Answers:
1-across – Learning : KNOWLEDGE
8-across – Material from tusks of certain mammals : IVORY
9-across – Extreme : DRASTIC
10-across – Suddenly collapse : KEELOVER
11-across – Pile : HEAP
13-across – Length of time in office : TENURE
14-across – Kick of gun : RECOIL
16-across – Garden store : SHED
17-across – Romantic ballad : LOVESONG
19-across – Deflate : LETDOWN
20-across – Shape of doughnut : TORUS
21-across – Exaggerated and incredible yarn : TALLSTORY
All Down Clues and Answers:
1-down – Part of piano. computer, etc : KEYBOARD
2-down – Great quantities : OODLES
3-down – Great quantity : LOAD
4-down – Play host : DOTHEHONOURS
5-down – Entertainer skilled at getting free from confinement : ESCAPOLOGIST
6-down – Speedily : LICKETYSPLIT
7-down – Relating to ruling system : GOVERNMENTAL
12-down – Of late : RECENTLY
15-down – Island containing Brunei : BORNEO
18-down – Gaffer : BOSS
This crossword has in total 22 where 12 are across and 10 are down.