Lots of eggs eaten by just one revolting fellow (6)
I believe the answer is:
george
'fellow' is the definition.
(George is a man's name)
'lots of eggs eaten by just one revolting' is the wordplay.
'lots of' means to remove the last letter (the majority of the word).
'eggs' becomes 'egg' ('egg' can be a synonym of 'eggs').
'eaten by just one' becomes 'roeg' (I am not sure about this - if you are sure you should believe this answer much more).
'revolting' is a reversal indicator.
'egg' with its last letter taken away is 'eg'.
'eg'+'roeg'='egroeg'
'egroeg' backwards is 'GEORGE'.
(Other definitions for george that I've seen before include "Man rowing on holiday" , "King" , "England's patron saint" , "Patron saint of England" , "-- Michael; -- Formby" .)