Related Clues:

• Slot filler in a gearwheel
• Gear projection
• Part of the works
• Type of wrench
• Peon
• Machinery part
• Organization functionary
• Minor yet vital part
• Minor worker
• Part of a wheel
• Wheel tooth
• Tooth that turns
• Gearwheel part
• Piece of machinery
• "I smell a ___, ___"