The unclued lights, which include one of four words, one of three words, two of two words, comprise a quotation in ODQ. Elsewhere, ignore one apostrophe.

       Across

   1  A wicket for Jasper’s cousin (5)

   6  Small capitals backed capital of dross (7)

16  Safe to give criticism, but not about daughter (7)

17  Fairly angry tirade dismisses queen more than once (7)

18  Greek character held by three others (3)

21  Sad old monk has appendix removed (5)

24  Boat Race crew, say, go around this? (4)

27  Globe switching ending of work by Bard (4)

28  State ethically uses force (5)

30  Heard once accurate prophetess that...