Way, we hear, that is travelled (4)
I believe the answer is:
rode
'is travelled' is the definition.
(eg travelled on a horse)
'way we hear' is the wordplay.
'way' becomes 'road' (road is a kind of way).
'we hear' shows a homophone (sound like).
'road' sounds like 'RODE'.
'that' is the link.
(Other definitions for rode that I've seen before include "Travelled on the back of an animal" , "did some travelling" , "Cycled" , "Travelled by bike" , "Journeyed" .)