Round the grid from 1 runs a quotation (1,3,4.2,5,3,5,3,2,6) from a play followed by the dramatist’s name (two words). Two pairs of unclued lights give the name of the speaker and a sparring partner. Elsewhere, ignore an accent.

Across

9 Romeo sharing bathroom with a woolly bear? (5)

10 The Enemy’s former sobriquet (3,4)

11 Regrets having to discard poet’s jewels (7)

13 Brown adult tree shrew (4)

15 Triple Martini drunk with endless glee (10)

16 Light shedders maybe no bishop makes resentful (8)

19 Very silly fish (5)

20 The turf, say, found next to yard by Mark (7)

21 In a twist, wasting month (5)

23 Gathering in...