He sold his soul to the Devil (5)
I believe the answer is:
faust
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">he sold his soul to the devil</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for faust that I've seen before include "Goethe's two-part tragedy" , "Tragic figure" , "Alchemist" , "Goethe play" , "Opera" .)