Small piece of land (5)
I believe the answer is:
islet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small piece of land</span>' is the definition.<br/ ><span class="explanation-format__explanation">(small island)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for islet that I've seen before include "Minor key" , "Tiles to make a small island" , "Stile (anag)" , "Rockall, for example" , "Small piece of land surrounded by water" .)