Quiet appreciation of music bears fruit (4)
I believe the answer is:
'fruit' is the definition.
(I know that pear is a type of fruit)
'quiet appreciation of music' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'appreciation of music' becomes 'ear' (as in 'having an ear').
'bears' acts as a link.
(Other definitions for pear that I've seen before include "Fruit tree" , "Cone-shaped fruit" , "Pomaceous fruit" , "Tapering fleshy fruit - reap it" , "Bartlett fruit" .)