Related Clues:

• Toothed rack or bar
• Set of teeth producing inane chatter
• Pawl grabber (Var.)
• Device stopping backward movement
• Set of teeth chatter uncontrollably
• Mechanical device preventing a wheel slipping backwards
• Device that allows movement in one direction only
• Damaged the cart's wheel? Maybe
• Increase incrementally, with 'up'
• Red mullet's tail taken by rodent that has teeth
• A toolmaker may produce one, setting one's teeth on edge
• Device preventing turning backwards
• Wheel in turnstiles
• Bar that fits into the notches of a toothed wheel
• Mechanism in a unidirectional wrench