Extremely wicked soul recycled Chopin pieces (7)
I believe the answer is:
sonatas
'pieces' is the definition.
(I have seen 'Classical pieces ' mean 'sonatas' so perhaps 'pieces' could also mean 'sonatas')
'extremely wicked soul recycled chopin' is the wordplay.
I cannot quite see how this works, but
'extremely' could be 'so' (I've seen this in other clues) and 'so' is present in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for sonatas that I've seen before include "eg Moonlight and Waldstein" , "Classical pieces" , "Instrumental compositions" , "10 [COMPOSITION]s" , "Piano pieces" .)