Minotaur slayer (7)
I believe the answer is:
theseus
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">minotaur slayer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for theseus that I've seen before include "Mythical hero" , "authority in the D [DREAM]" , "Founder-hero of Athens" , "Ariadne's abandoner" , "Rescuer of Ariadne" .)