TRENCH

Long narrow depression in the ocean bed (6)

Solution has appeared in 2 crosswords (2 across and 0 down):

• Quick crossword No 15,984 — 2021-07-29 23:00:44
  1A: Soldiers' defensive ditch (6)
• Quick crossword No 15,837 — 2021-02-09 00:00:56
  13A: Long narrow depression in the ocean bed (6)