One of a trio gets food and drink (5)
I believe the answer is:
cheer
'food and drink' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for cheer that I've seen before include "Fare" , "Hearten; shout" , "Festive food and drink" , "provisions for feast" , "hurrah" .)