Eat like a champ? (5)
I believe the answer is:
munch
This clue is a double definition.
'eat' is the first definition.
(I know that munch is a type of bite)
'a champ?' is the second definition.
(both can mean to bite)
'like' is the link.
(Other definitions for munch that I've seen before include "Chomp" , "Eat steadily; Norw. artist" , "Edvard -, Norwegian artist (The Scream)" , "Eat audibly; painter" , "who put one screaming on the canvas?" .)