Carmelite again conceals drink (3)
I believe the answer is:
tea
'drink' is the definition.
(tea is a drink)
'carmelite again conceals' is the wordplay.
'conceals' says the answer is hidden in the clue.
'TEA' is hidden within 'carmelite again'.
(Other definitions for tea that I've seen before include "This towel is for drying dishes" , "Perhaps Indian" , "Cha" , "Cuppa" , "Infusion of dried leaves" .)