Othello's false friend (4)
I believe the answer is:
iago
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">othello's false friend</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 iago that I've seen before include "Evil character in Othello" , "The villain who tricked Othello" , "Othello's enemy" , "stage villain" , "Othello's treacherous officer" .)