See you scoff very much (8)
I believe the answer is:
farewell
'see you' is the definition.
(both are ways of saying goodbye)
'scoff very much' is the wordplay.
'scoff' becomes 'fare' (both can mean food).
'very much' becomes 'well' (well can mean very much or to a great extent).
'fare'+'well'='FAREWELL'
(Other definitions for farewell that I've seen before include "Say goodbye" , "Departure" , "Wish on leave-taking" , "symphony" , "Parting word" .)