Green tea brewed for young person (8)
I believe the answer is:
teenager
'for young person' is the definition.
(I've seen this before)
'green tea brewed' is the wordplay.
'brewed' indicates anagramming the letters.
'green'+'tea'='greentea'
'greentea' is an anagram of 'TEENAGER'.
(Other definitions for teenager that I've seen before include "14, perhaps" , "Young person" , "troublesome youth" , "one no longer twelve?" , "Adolescent" .)