Cost of travel and food (4)
I believe the answer is:
fare
I believe this clue is a double definition.
'cost of travel' is the first definition.
(as in a train fare)
'food' is the second definition.
(I know that fare is a type of food)
'and' acts as a link.
(Other definitions for fare that I've seen before include "Get on - passenger - provisions" , "Food provided in fear" , "Charge for travelling on train or bus" , "Food for the cost of a journey" , "Menu" .)