Not typically classical, though maybe traditional in style (5)
I believe the answer is:
jazzy
'not typically classical though maybe traditional in' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I can't see?
'style' is the wordplay.
I cannot really see how this works, but
'style' could be 'jazz' (I have seen 'Style of music ' mean 'jazz' so perhaps 'style' could also mean 'jazz') and 'jazz' is found in the answer.
A single letter 'y' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for jazzy that I've seen before include "Loud" , "Improvised musically" , "Flashy" , "Gaudy" .)