Tom Swifties solution

The missing clue (for STERNly) led to an answer that was unambiguous, I reckon, but that shouldn’t have troubled you.

TOM SWIFTIES

STERNly; FLATly; ILL-ADVISEDly; MODESTly; BELATEDly; HALF-HEARTEDly; BASHFULly; DISGUSTEDly; AMAZEDly; GINGERly

ACROSS

8 RIVO; I v in ro(d)

9 SPAY; p in say

10 LORE; lo! RE

11 EBONIST; anag.

12 DOGMA; dog MA

13 GLUE; cf. luge

14 EROSE; hidden

16 LOGO; lo! go

17 INSTATE; in state

18 PEAR; pear(l)

20 STUD; 2 mngs.

22 DIET; die t

24 VIVA; v in via

25 ORRIS; (m)orris

27 ABUT; A but

28 TRIAS; tria(l) S

29 PREZZIE; zz in pre i.e.

30 SWAG; w in sag

31 EATS; ea + St. (rev.)

32 EWER; w in e’er & lit.

DOWN

1 AIBLINS; n in anag.

2 HONEST; hidden

3 UPSHOT; U PS hot

4 LATE; (p)late

5 HYDROPLANE; (w)hy drop lane

6 ALOOF; al(l) oof

7 LOG-SLATE; log’s late

15 ASTERIAS; anag.

19 REQUIEM; RE quie(t) m & lit.

21 EVERTS; ever t(urn)s

23 TRAGI; tragi(c)