William Tell composer (7)
I believe the answer is:
rossini
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">william tell composer</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 rossini that I've seen before include "Composer of 'The Barber of Seville' and 'William Tell'" , "Composer of the opera William Tell, d. 1868" , "whose barber was in Seville" , "he scored regularly" , "Great musician" .)