SOUR

Acidic (4)

Solution has appeared in 2 crosswords (1 across and 1 down):

• Quick crossword No 15,875 — 2021-03-25 00:00:12
  3D: Not sweet (4)
• Quick crossword No 15,581 — 2020-04-14 23:00:28
  8A: Acidic (4)