Sheltered inlet (4)
I believe the answer is:
cove
'sheltered inlet' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cove that I've seen before include "sheltered recess at Lulworth?" , "Old fish" , "Small bay or Dickensian chap" , "A small inlet or slangy bloke" , "A small sea inlet or slangy man" .)