Revolutionary piano melodies bearing fruit (5)
I believe the answer is:
lemon
'fruit' is the definition.
(lemon is a kind of fruit)
'revolutionary piano melodies bearing' is the wordplay.
'revolutionary' says the letters should be written backwards.
'bearing' indicates the answer is hidden within the clue (the clue carries or bears the answer inside it).
'nomel' is hidden within 'piano melodies'.
'nomel' written backwards gives 'LEMON'.
(Other definitions for lemon that I've seen before include "definitely not a peach" , "Something worthless" , "something defective" , "Shade of yellow - fruit" , "Fruit (which is proverbially "the answer")" .)