Travel free over Spain (4)
I believe the answer is:
ride
'travel' is the definition.
(riding is a kind of travelling)
'free over spain' is the wordplay.
'free' becomes 'rid' ('rid' can be a synonym of 'free'**).
'over' is a charade indicator (letters next to each other).
'spain' becomes 'e' (abbreviation for Espana).
'rid'+'e'='RIDE'
(Other definitions for ride that I've seen before include "Travel on the back of animal" , "A dire sort of journey" , "Journey on horseback" , "Go by bicycle" , "Travel (on a bike, perhaps)" .)