Wife of Theseus (7)
I believe the answer is:
phaedra
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wife of theseus</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for phaedra that I've seen before include "Tragic old Greek" , "Wife of Theseus, subject of a play by Racine" , "Wife of Theseus who fell in love with his son" , "tragedy" .)