Eight unclued lights, arranged symmetrically, comprise two quartets, one of which makes the other go round.

Across

1 How much poor Matthew has aged (14, three words)

11 What’s got blowers regularly engaged? (5)

13 Cheeky make-up (5)

14 Nothing fresh about first social reformer (7)

15 Some change local larder outside flat (10)

17 Blame husband for going in basin (5)

21 View rascal across floor (6, two words)

23 Partner works both ways (4)

26 Brown primates hold one back (5)

27 Clean up exposed broken bones (5)

28 Stone set in epoxy not backed (4)

30 Encouragement to prima donna, a lady (6)

36 Place of beauty offering relief and ecstasy...