Austrian composer of the Trout Quintet (8)
I believe the answer is:
schubert
(Other definitions for schubert that I've seen before include "Butchers (anag) - composer, d. 1828" , "Franz -, Austrian composer (Trout Quintet, etc)" , "Austrian composer of the Trout piano quintet" , "Butchers embrace great German composer" , "Lieder composer" .)