Agamemnon's daughter (7)
I believe the answer is:
electra
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">agamemnon's daughter</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 electra that I've seen before include "type of complex" , "heroine of Greece" , "Greek heroine (with a complex!)" , "Daughter of Agamemnon and Clytemnestra (who has a complex?)" , "King's daughter" .)