One kind of food, out East, a great deal eaten (5)
I believe the answer is:
feast
'one kind of food' is the definition.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for feast that I've seen before include "Celebratory meal" , "Abundant meal" , "Junket" , "Beano" , "Lavish meal" .)