Felix —, composer (11)
I believe the answer is:
mendelssohn
(Other definitions for mendelssohn that I've seen before include "Elijah composer" , "Composer of Fingal's Cave overture, d. 1847" , "Wedding March composer" , "German composer, Felix, d. 1847" , "German romantic composer of orchestral and choral works, d. 1847" .)