Drink in order to eat? (3)
I believe the answer is:
tea
'drink' is the definition.
(tea is a drink)
'order to eat?' is the wordplay.
'order' indicates an anagram.
'eat' is an anagram of 'TEA'.
'in' acts as a link.
(Other definitions for tea that I've seen before include "Perhaps Indian" , "This towel is for drying dishes" , "Early evening meal" , "Evening meal - eat up" , "Drink made from leaves" .)