"Brandenburg Concertos” composer (4)
I believe the answer is:
bach
'brandenburg concertos composer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bach that I've seen before include "German baroque composer, d. 1750" , "Welsh term of endearment" , "JS --, baroque composer" , "Affectionate address" , "dear to the Welsh" .)