CAKE

It could contain soap or sponge (4)

Solution has appeared in 3 crosswords (1 across and 2 down):

• Quick crossword No 16,612 — 2023-08-02 23:00:27
  1A: Confection (Madeira, fairy or birthday?) (4)
• Quick crossword No 16,167 — 2022-03-02 00:00:24
  3D: Gateau (4)
• Quick crossword No 15,766 — 2020-11-17 00:00:19
  7D: It could contain soap or sponge (4)