Eight unclued lights (four of two words) are of a kind.

Across

1 False prophet faces interjection, perhaps (12, three words)

10 Old soldier heartily opposes Prohibition (4)

12 Women perorate furiously about Welsh sustainable energy source (10, two words)

14 Spell first half of ‘exhume’ wrong (3)

15 Person rebuking extremely restive demonstrator (8)

19 Porky pianist regularly stays in bed (6, hyphened)

22 Such fish are briefly making comeback in channels (6)

24 Onions’ relative originally eaten on knife (5)

27 Playing reggae on street, daughter moved unsteadily (9)

29 Chauvinist dictator’s spirit and energy (5)

...