Last bits of production to get redone and set to music (4)
I believe the answer is:
note
'music' is the definition.
('note' can be a synonym of 'musical note')
'last bits of production to get redone' is the wordplay.
'last bits of' says to take the final letters.
The final letters of 'production to get redone' are 'NOTE'.
'and set to' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for note that I've seen before include "Traitor" , "Be mindful of" , "Observation" , "Short communication" , "Memo; pay attention to" .)