Ignore written notes - this is the place to stop tucking into fruit (4,2,3)
I believe the answer is:
play by ear
'ignore written notes' is the definition.
(as in playing music by ear rather than sheet music)
'the place to stop tucking into fruit' is the wordplay.
'the place to stop' becomes 'layby' (place to stop on a road).
'tucking into' indicates putting letters inside.
'fruit' becomes 'pear' (pear is a kind of fruit).
'layby' placed into 'pear' is 'PLAY BY EAR'.
'this is' acts as a link.
(Other definitions for play by ear that I've seen before include "Proceed by instinct - without sheet music?" , "improvise" , "Perform music without written score" .)