6  At last, Jacob Marley cooked an apple (7)

 7  Explanation for boxer taking swings both ways (5)

 9  Singer Isaac in audition for Blur (4)

10 Holding notes as I played with tunings (10)

11 Extent of reports about being too old (8)

13 Private patient likely to be here (6)

15 Weakens around these resorts? You'd hope not! (4)

17 Vigour expressed in cover version (5)

18 Part of window in which last bit of glass remains (4)

19 Rises from the grave in Y-Fronts? (6)

20 One of a bunch for Doctor Cathy in Hospital? (8)

23 She may be in top form (10)

26 Peer getting away with kidnapping at first (4)

27 Worried about school, so it's said (5)

28 Theologian follows martial art - he was a funny chap (3,4)

 2  In the manner of music from Jamaica, a sizeable state (6)

 3  Watches from the heart of Switzerland? Of course (4)

 4  Amazing bust and backside in risque publication (8)

 5  Function announced for Leo, perhaps (4)

 6  Party - you're not coming? That would ___ (5)

 8  Pays no attention to topless Italian gentlemen (7)

12 World of emotion, top to bottom (5)

14 State in which nothing was chaotic (10)

16 Pine after slate? That shows style (7)

17 A series of jars, perhaps, that'll get you well lubricated (8)

21 Ill at sea, though not sick to begin with (6)

22 Pulled, with the intention of getting married... (5)

24 ...and getting these - vows husband rejected (4)

25 Tattoo your head black (4)