Something to wash down with nectar? (8)

I believe the answer is:

ambrosia

I'm a little stuck... Click here to teach me more about this clue!

'nectar?' is the definition.
('ambrosia' can be a synonym of 'nectar')

I don't understand the rest of the clue.

(Other definitions for ambrosia that I've seen before include "Food and drink of gods" , "Siam boar as food for the gods" , "I'm so Arab (anagram)" , "good food" , "Food of Greek and Roman gods" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app