Six unclued lights (all real words) are the names of 35/26 minus one letter. The missing letters match those that will appear in the shaded squares.

Across

1 Take in fire shoe for small firefighter? (11, two words)

7 Titian’s comb (3)

11 Bum governor newspaper backed (6)

15 Evil spirit with heart of grotty sod (5)

16 Camorrist’s gold lace (5)

17 Last part of game to finish (6, two words)

18 Bard’s ashes left in peace (5)

20 Abhorring PT slack stepdame cancels (6)

21 Capuchin pressing for porticos (5)

27 Palest Greek broods beside Troy (7)

29 German menials in sandals (5)

30 Cyst entered round potato (6)

32 University nine...