Defoe's castaway (6)
I believe the answer is:
crusoe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">defoe's castaway</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 crusoe that I've seen before include "Shipwrecked hero" , "Defoe's hero derived" , "shipwrecked fellow" , "See 9" , "Robinson on the island" .)