Possible Clues:

• Masticate between the teeth
• Break down when about to be put away
• How to eat cold chop?
• Masticate, grind between teeth
• Bite the head off and cut what's left
• Consider (with ''over'')
• '___ your food' (mother's admonition)
• Work between teeth, masticate
• It's not to do this that one may 36 acrosses
• Stick of gum, e.g.