2702: Some beef

Nine unclued lights form three triplets, each related in a different way to the tenth.

Across

1    Cartoonist has formerly captivated Spain (5)

10    Swayed and quit, sick in the stomach (10)

14    Handles fine fish (5)

15    Have a few days at skate park (5)

16    As support, use skinny leg (4,2)

20    Dancer for one popular in scarlet always (8)

21    A lamb chop? (7)

22    Former army head smokes (4)

25    Coal say in chimney left to the end (4)

29    Manage what deli may supply (4,4)

33    Sea having a unifying motif (6)

34    Teenager cleaned out in pathetic fiddle (5)

35    Transport apparently good army sections (5)

36    May shortly...