Food; taxi passenger (4)
I believe the answer is:
This clue is a double definition.
'food' is the first definition.
(I know that fare is a type of food)
'taxi passenger' is the second definition.
(fare can mean someone paying a taxi fare)
(Other definitions for fare that I've seen before include "Menu" , "Transport charge" , "Charge for journey" , "Get on - passenger - provisions" , "Taxi passenger; food" .)