Musical dramas (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">musical dramas</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 operas that I've seen before include "La Traviata, Aida" , "Dramatic works set to music" , "They're written by 1 across" , "Cos? fan tutte and The Magic Flute" , "Stage dramas" .)
(Other definitions for operettas that I've seen before include "10d [IOLANTHE], 45d [RUDDIGORE] and 6a [PRINCESS IDA], say" , "Light musicals for poetaster" , "Musical compositions as by Gilbert & Sullivan" , "Performances" .)