Cease nestling - according to the Reverend, it takes two of these to eat (9)
I believe the answer is:
chopstick
'it takes two of these to eat' is the definition.
(chopsticks are used to eat food)
I don't understand how the rest of the clue works.
(Other definitions for chopstick that I've seen before include "In the plural, they're oriental cutlery" , "member of consumer association" , "Eastern eating utensil" , "Oriental eating utensil" .)