Island north of Montecristo (4)
I believe the answer is:
elba
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">island north of montecristo</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for elba that I've seen before include "Island in the Med" , "place for Napoleon" , "Italian isle" , "Napoleonic island" , "part of Tuscany?" .)