Speck of land in the sea (5)
I believe the answer is:
islet
'speck of land in the sea' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for islet that I've seen before include "Stile (anag)" , "Little bit of land" , "detached territories?" , "One of Langerhans's" , "Piece of land in e.g. river" .)