On way back, plans to get something to eat (4)
I believe the answer is:
spam
'something to eat' is the definition.
(spam is a meat product)
'on way back plans' is the wordplay.
'on way back' says the letters should be written backwards.
'plans' becomes 'maps' (I've seen this before).
'maps' reversed gives 'SPAM'.
'to get' is the link.
(Other definitions for spam that I've seen before include "Uninvited email" , "Possible item from menu" , "luncheon meat" , "email messages" , "unwanted delivery" .)