"The Merry Widow" composer (5)
I believe the answer is:
lehar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the merry widow composer</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 lehar that I've seen before include "Austrian of note" , "Hungarian who composed" , "Operettist" , "He scored" , "Viennese composer" .)