BOOM

Surge (4)

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

• Quick crossword No 16,690 — 2023-11-02 00:00:23
  17D: Loud noise – period of prosperity (4)
• Quick crossword No 15,866 — 2021-03-15 00:00:45
  8A: Surge (4)