Going to the East with you (4)
I believe the answer is:
thee
'you' is the definition.
(I've seen this before)
'going to the east' is the wordplay.
'going to' means one lot of letters go next to another.
'east' becomes 'e' (synonyms).
'the' next to 'e' is 'THEE'.
'with' acts as a link.
(Other definitions for thee that I've seen before include "Poetically you" , "Old objective second person singular" , "'U'" , "You in the olden days" , "Quaker 'you'" .)