Free European travel (4)
I believe the answer is:
ride
'travel' is the definition.
(eg to ride a bus)
'free european' is the wordplay.
'free' becomes 'rid' (to be free of something is to be rid of it).
'european' becomes 'E' (abbreviation e.g. EU).
'rid'+'e'='RIDE'
(Other definitions for ride that I've seen before include "Travel upon" , "badger" , "Journey on horseback" , "To control" , "Fairground entertainment" .)