Sicily or Sardinia (4)
I believe the answer is:
isle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sicily or sardinia</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that Sicilia is a island)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for isle that I've seen before include "Little land" , "See 10 Down" , "Land surrounded entirely by water" , "Small landmass" , "This is sceptred!" .)