Composer in Cuba: Chadwick (4)
I believe the answer is:
bach
(Other definitions for bach that I've seen before include "Johann Sebastian . . . ., great 18th century German composer" , "German composer (affectionate to a Welshman?)" , "JS --, baroque composer" , "Brandenburg Concertos composer, d. 1750" , "German organist and composer, d. 1750" .)