I am returning to gobble top third of snack with drink (6)
I believe the answer is:
mimosa
'drink' is the definition.
(champagne and orange juice drink)
'i am returning to gobble top third of snack' is the wordplay.
'i am' becomes 'i'm'.
'returning' is a reversal indicator.
'to gobble top' becomes 'mos' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'third of snack' becomes 'a' (srd letter of 'snack').
'im' written backwards gives 'mi'.
'mi'+'mos'+'a'='MIMOSA'
'with' is the link.
Can you help me to learn more?
(Other definitions for mimosa that I've seen before include "Type of acacia tree" , "Plant genus popularly extended to the Acacia" , "cocktail" , "Tropical tree or shrub with clusters of fragrant flowers" , "Tropical plant" .)