Opera text (8)
I believe the answer is:
libretto
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">opera text</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for libretto that I've seen before include "text for musicians" , "component of opera" , "Words set to music, especially opera" , "Text written for an opera" , "Book of words of a musical" .)