One way to travel is to walk (6)
I believe the answer is:
stride
'is to walk' is the definition.
(stride can mean to walk around)
'one way to travel' is the wordplay.
'one way' becomes 'st' (abbreviation for street).
'to travel' becomes 'ride' (eg to ride a bus).
'st'+'ride'='STRIDE'
(Other definitions for stride that I've seen before include "use your legs!" , "Step out energetically" , "Extended footstep" , "style of jazz piano" , "Long decisive step" .)