Ten agree to brew drink (5,3)
I believe the answer is:
green tea
'drink' is the definition.
(type of tea)
'ten agree to brew' is the wordplay.
'to brew' indicates anagramming the letters.
'ten'+'agree'='tenagree'
'tenagree' is an anagram of 'GREEN TEA'.
(Other definitions for green tea that I've seen before include "Drink - generate (anag)" , "Teen rage (anag.)" , "Infused drink" , "Oriental leaves" , "Beverage" .)