Masticated (6)
I believe the answer is:
chewed
'masticated' is the definition.
('chew' can be a synonym of 'masticate')
This is all the clue.
(Other definitions for chewed that I've seen before include "Masticated between teeth - maybe gum" , "Masticated, worked with teeth" , "Made use of teeth" , "Worked or ground between the teeth" , "Munched" .)