FIGHT

Campaign against — quarrel (5)

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

• Quick crossword No 16,102 — 2021-12-15 00:00:11
  20A: Combat (5)
• Quick crossword No 15,442 — 2019-11-04 00:00:08
  5D: Campaign against — quarrel (5)