ESTUARY

Lower tidal part of a river (7)

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

• Quick crossword No 15,934 — 2021-06-01 23:00:24
  15D: Wide part of a river as it nears the sea (7)
• Quick crossword No 15,631 — 2020-06-11 23:00:05
  7D: River mouth (7)
• Quick crossword No 15,327 — 2019-06-21 23:00:56
  1A: Lower tidal part of a river (7)