Food to be paid for on delivery (3)
I believe the answer is:
cod
I believe this is a double definition.
'food' is the first definition.
(cod is a kind of food)
'paid for on delivery' is the second definition.
(abbreviation for 'cash on delivery')
'to be' is the link.
(Other definitions for cod that I've seen before include "faked" , "One caught in the deep maybe" , "Not a real" , "Hoax (sl.); fish" , "Pull the leg of - a fish?" .)