Bay or bight (5)
I believe the answer is:
inlet
I believe this clue is a double definition.
'bay' is the first definition.
(I've seen this in another clue)
'bight' is the second definition.
(thesaurus)
(Other definitions for inlet that I've seen before include "Arm of lake, river" , "A small creek or cove" , "Fjord" , "Place of entry" , "Mouth of creek" .)