Opera by Britten (5,6)
I believe the answer is:
peter grimes
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">opera by britten</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 peter grimes that I've seen before include "outcast fisherman" , "noted fisherman" , "Britten's fisherman opera" , "Opera by Benjamin Britten" , "Britten's loner fisherman" .)