Traditional Chinese beverage (5,3)
I believe the answer is:
'traditional chinese beverage' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for green tea that I've seen before include "Teen rage (anag.)" , "Drink - generate (anag)" , "'Asian herbal drink (5,3)'" , "Colourful drink for teenager" , "Healthy drink" .)