1: Slangily, hip old English author (5)
2: A right given to colliery worker or sailor (7)
3: Odds of niece being born (3)
4: Doctrine for some Kiwis makes sense (3)
5: Think at length about lost planet, comet (11)
6: Group of eight initially outwits coup to enter Tripoli (5)
7: 'Wrong and sick,' I quote... almost (7)
10: Woody is to eviscerate Human Resources, that is (7)
12: Heavenly visitor to arrive on time (5)
13: Crazy to clean sons in awful mess (11)
14: To leaf I turn, becoming leafy (7)
16: Frost over mid-January during epic exploit (3,2)
18: We hear you will record part of a Christmas celebration (4,3)
20: Put off a record player and run out after orchestra leader (7)
24: Scrabble piece having D and a diacritical mark (5)
27: Copy of top ten missing (3)
28: Get into the archeology scene. (3)