CLUE

Aid to detection (4)

Solution has appeared in 3 crosswords (0 across and 3 down):

• Quick crossword No 16,640 — 2023-09-04 23:00:14
  23D: This is one! (4)
• Quick crossword No 15,818 — 2021-01-18 00:00:14
  20D: Inkling (4)
• Quick crossword No 15,591 — 2020-04-26 23:00:27
  20D: Aid to detection (4)