Make green tea after brewing (8)
I believe the answer is:
generate
'make' is the definition.
(generating is a kind of making)
'green tea after brewing' is the wordplay.
'after' is a charade indicator (letters next to each other).
'brewing' indicates anagramming the letters.
'green'+'tea'='greentea'
'greentea' is an anagram of 'GENERATE'.
(Other definitions for generate that I've seen before include "Father" , "Make" , "available in form" , "Engender" , "Give rise to" .)