Opera by Bizet (6)
I believe the answer is:
carmen
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">opera by bizet</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 carmen that I've seen before include "Musical from Bizet opera" , "Spanish opera by Bizet" , "Bizet's great Spanish opera" .)