"Don Giovanni," for one (5)
I believe the answer is:
opera
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">don giovanni for one</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for opera that I've seen before include "Musical entertainment" , "Musical theatre work" , "Grand or comic work?" , "Billy Budd, for instance" , "Carmen, for example" .)