The scent of a wanderer, one hears (5)
I believe the answer is:
aroma
'the scent' is the definition.
(synonyms)
'a wanderer one hears' is the wordplay.
'wanderer' becomes 'roamer' (someone roaming around).
'one hears' shows a homophone (sound like) (I've seen 'hear' mean this).
'roamer' sounds like 'roma'.
'a'+'roma'='AROMA'
'of' acts as a link.
(Other definitions for aroma that I've seen before include "A pleasant smell as of food" , "particular charm" , "Distinctive smell" , "Pervasive atmosphere" , "Pervasive quality" .)