Below are possible answers for the crossword clue Estuary.
INLET
an opening through which fluid is admitted to a tube or container
an arm off of a larger body of water (often between rocky headlands)
RIA
A long narrow inlet of the seacoast, being a former valley that was submerged by a rise in the level of the sea. Rias are found especially on the coasts of SW Ireland and NW Spain.
A wedge -shaped coastline.
Long narrow inlet of the sea coast found especially in South west Ireland
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