Free trip going to the East (3)
I believe the answer is:
rid
'free' is the definition.
(to be free of something is to be rid of it)
'trip going to the east' is the wordplay.
'trip' becomes 'ride' (eg a trip in a car).
'going' is a deletion indicator.
'to the east' becomes 'E' (abbreviation).
'ride' with 'e' removed is 'RID'.
(Other definitions for rid that I've seen before include "Throw off, unburden" , "Lose, shake off" , "Free, relieve" , "Free, disencumber" , "Disabuse" .)