Divine drink (6)
I believe the answer is:
nectar
'divine drink' is the definition.
(drink of the gods in classical mythology)
This is all the clue.
(Other definitions for nectar that I've seen before include "Sweet, delicious, drink" , "Sweet plant secretion" , "Social workers collect it" , "Sugary stuff in plants to attract insects" , "From which 18dn is made" .)