AFFIRM

Attest (6)

Solution has appeared in 2 crosswords (2 across and 0 down):

• Quick crossword No 16,042 — 2021-10-05 23:00:09
  20A: Declare formally to be true (6)
• Quick crossword No 15,886 — 2021-04-06 23:00:28
  15A: Attest (6)