Chopin piece, a dance (3)
I believe the answer is:
hop
'a dance' is the definition.
(hop is a kind of dance)
'chopin piece' is the wordplay.
'piece' indicates the answer is hidden within the clue.
'HOP' can be found hidden inside 'chopin'.
(Other definitions for hop that I've seen before include "Spring" , "Jump; dance" , "It's used in brewing" , "Skip; beer flavouring ingredient" , "Beer flavouring; jump" .)