Related Clues:

• Bridging tool?
• Small bicycle accessory I dropped, a tool
• Set of teeth producing inane chatter
• Wrench, to a Brit
• Tool, small, I got out of bag
• Device stopping backward movement
• Mechanic's agent that might cause difficulty in the works
• Set of teeth chatter uncontrollably
• Mechanical device preventing a wheel slipping backwards
• Small bicycle accessory — I dropped a tool
• 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