Plain #03 by Mango

ACROSS
1 Leftovers unbaked - squabble heatedly (6,3,6)
9 Smile about non-U rug, area rug from Turkey? (7)
10 An instrumental flourish making groupie cheer (7)
11 With one bound, swiftly cross Scottish burn (5)
12 Pharaoh's name recollected by knowing about scripture (9)
13 Most of nautical trips taking time to discover primitive life forms (8)
15 Go downhill - four points to secure gold (6)
18 Former chess champion backed by his country of birth (6)
19 Water lilies boss placed between north wing and south (8)
22 Compact pieces found in afternoon hail (9)
24 Cross seen outside East German city (far to the east) (5)
25 Like to travel by horse, but not sidesaddle (7)
26 Newton at the heart of computing theorist's revolution (7)
27 Threesome's ecstasy threefold, relating kinkily (7,8)

DOWN
1 Tabby is prepared to look after another's young (4-3)
2 Bird with informal hairstyle hanging around attractive hunk (straight!) (3,6)
3 Dapple-grey reptile out of Zambia (5)
4 One thousand dollars current payment for alluring feminine form (8)
5 Prat, um? (6)
6 Gosh, quina's out as compound used to treat malaria (9)
7 Strike up - time to perform (5)
8 90 in stronghold and American navy providing joint protection (4-3)
14 Cold interior failing test (9)
16 Hummingbird - it's in the wings! (9)
17 Review anti-tank troops? I will! (8)
18 Shake a leg - no need for silence! - must escape (7)
20 Pet owl (7)
21 Bar had up after hosting adult show (6)
23 Prehistoric hill fort, with hint of escarpment - it's early, archaic (5)
24 Earth protected by water rationing (5)

To enter the competition send your solution , in list format, to me at derek@crosswordcentre.fsnet.co.uk before the 1st June 2007. The first correct entry picked will win a copy of Chambers Book of Independent Cryptic Crosswords which has been donated by the publishers.