A way to travel is to walk (6)
I believe the answer is:
stride
'walk' is the definition.
(I've seen this before)
'a way to travel' is the wordplay.
'a way' becomes 'st'.
'to travel' becomes 'ride' (riding is a kind of travelling**).
'st'+'ride'='STRIDE'
'is to' is the link.
(Other definitions for stride that I've seen before include "Long step of direst kind" , "march" , "Walk along in direst way" , "Take long steps" , "Long walking step" .)