Unclued lights (one of two words, the others paired) are of a kind.

Across

7Lace branches left in fruit tree (6)

11After study, forgetting the year, doubting what William was famous for (10)

13Appealing to restrain husband’s slide (5)

14It strengthens bricks originally placed in tower (5, hyphened)

15Mounted, moving south towards the coast (7, two words)

17Aim in wrong direction so fail to score goal (7)

18Robber I talk foolishly about (6)

19Married Indian eccentric, freeing insect (4)

22Intervene, beginning to punch in the mug (6, two words)

24Terrible noise at port compound (9)

25Jingle perhaps shows one negative effect (5)

28To appear important, weaver exercising glare (9, two words)

30Unnecessary once to be carried around (6, two words)