Food for the journey east (5)
I believe the answer is:
tripe
'food' is the definition.
(tripe is a kind of food)
'journey east' is the wordplay.
'journey' becomes 'trip' (trip is a kind of journey).
'east' becomes 'E' (synonyms).
'trip'+'e'='TRIPE'
'for the' acts as a link.
(Other definitions for tripe that I've seen before include "Rubbish (edible, maybe)" , "Rubbish (colloq.)" , "Stomach for consumption; nonsense" , "Rubbish; stomach as food" , "Rubbish - it's ox stomach linings" .)