Related Clues:

• 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
• Rodent caught by the unusual mechanical device
• Mechanical device used by fantasy author, not the first or the last
• Gradually increase, with 'up'
• Device stopping backward motion
• Increase incrementally, with "up"