Drink of the Greek gods (6)
I believe the answer is:
nectar
'drink of the greek gods' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for nectar that I've seen before include "Bees drink it" , "Delicious drink for Cretan" , "Ambrosia" , "Trance (anag)" , "From which 18dn is made" .)