Set aside for the listener to note (7)
I believe the answer is:
earmark
'set aside' is the definition.
(synonyms)
'listener to note' is the wordplay.
'listener' becomes 'ear' (body part which hears or listens).
'to note' becomes 'mark' ('mark' can be a synonym of 'note').
'ear'+'mark'='EARMARK'
'for the' is the link.
(Other definitions for earmark that I've seen before include "Set aside for special purpose" , "reserve for future use" , "spot where The Ring may be put on?" , "'Reserve, set aside (7)'" , "Reserve for later use" .)