See you as well swallowing endlessly large amounts (6-2)
I believe the answer is:
toodle-oo
'see you' is the definition.
(both can mean goodbye)
'as well swallowing endlessly large amounts' is the wordplay.
I cannot really understand how this works, but
'large' could be 'l' (eg in clothes sizes) and 'l' is present in the answer.
'as well' could be 'too' (both can mean 'also') and 'too' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for toodle-oo that I've seen before include "Goodbye (dated)" , "See you later!" , "Ta-ta" , "Farewell (old inf.)" , "Bye!" .)