He composed a phonic arrangement
I believe the answer is:
chopin
'he composed a' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'phonic arrangement' is the wordplay.
'arrangement' indicates an anagram.
'phonic' is an anagram of 'CHOPIN'.
Can you help me to learn more?
(Other definitions for chopin that I've seen before include "Double centenarian" , "Polish composer and pianist, d. 1849" , "Great Polish composer of phonic kind" , "his writing noted" , "Polish pianist-composer" .)