Short musical number follows for each individual (6)
I believe the answer is:
person
'individual' is the definition.
('person' can be a synonym of 'individual')
'short musical number follows for each' is the wordplay.
'short' means to remove the last letter.
'musical number' becomes 'song' (I've seen this before).
'follows' is a charade indicator (letters next to each other).
'for each' becomes 'per' (I've seen this before).
'song' with its last letter taken off is 'son'.
'son' after 'per' is 'PERSON'.
(Other definitions for person that I've seen before include "Individual human being" , "A man or woman" , "present appearing in this" , "See 17" , "Type" .)