The unclued lights (one of four words) are legendary.

Across

9 Broadcast live in Torbay possibly to no avail (10)

14 Mark said to be a jerk (3)

16 Marvin Gaye’s ‘Healing’ depends on chromosomes (6)

17 Person I’m addressing, with most of the next generation (5)

18 Man died on beach, once (5)

22 United around military leader and single-minded (7)

24 Composer set up a German school in London with new head (7)

25 Fairy that dished the team? (5)

26 Non-eco tyros providing points of a dilemma (5)

28 Funny posts at work? (7, two words)

31 About to punch nurse, wild person off drugs (7, two...