"Vexations” composer (5)
I believe the answer is:
satie
'vexations composer' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for satie that I've seen before include "scorer" , "Erik -----, French early minimalist composer" , "French composer of the Gymnopedies, d. 1925" , "French composer (Trois Gymnopedies)" , "Erik -, nineteenth to twentieth century French composer" .)