Put on or perform a Chopin finale (3)
I believe the answer is:
don
'put on' is the definition.
('don' can be a synonym of 'put on')
'perform a chopin finale' is the wordplay.
'perform' becomes 'do' ('do' can be a synonym of 'perform').
'finale' indicates one should take the final letters.
The final letter of 'chopin' is 'n'.
'do'+'n'='DON'
'or' is the link.
(Other definitions for don that I've seen before include "Spanish male title" , "Member of university" , "Spanish nobleman" , "European river" , "Get into" .)