Nielsen, perhaps omitting start of chorus from ballet (4)
I believe the answer is:
dane
'nielsen perhaps' is the definition.
(composer Carl Nielsen is an example)
'omitting start of chorus from ballet' is the wordplay.
I cannot really understand how this works, but
'from' could be 'e' (I've seen this in other clues) and 'e' is present in the answer.
The remaining letters 'dan' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
(Other definitions for dane that I've seen before include "EU citizen" , "Person from Copenhagen" , "Hamlet, say" , "One from Esbjerg" , "Eg, Hamlet" .)