Narrow arm of a sea (5)
I believe the answer is:
inlet
(Other definitions for inlet that I've seen before include "Entry; arm of the sea" , "Entry port" , "Small area of sea" , "Sound" , "A small creek or cove" .)
I believe the answer is:
inlet
(Other definitions for inlet that I've seen before include "Entry; arm of the sea" , "Entry port" , "Small area of sea" , "Sound" , "A small creek or cove" .)