Hector —, composer of operas Beatrice et Benedict and Les Troyens (7)
I believe the answer is:
berlioz
(Other definitions for berlioz that I've seen before include "Composer of The Damnation of Faust, d. 1869" , "One composer" , "French composer of "Symphonie fantastique"" , "Trojans composer" , "French composer, d. 1869" .)