Related Clues:

• Canines, molars, etc
• Real effectiveness of cogs in the machine, perhaps
• Force visitor from afar into the ground
• Cogwheel projections
• Being in your face, they add effectiveness
• Incisors, say
• Molars, incisors, etc
• Lettuce sandwiches good for teeth
• Cog wheel projections
• Genuine effectiveness
• Brush targets
• They're often brushed
• Choppers for ET returning to the action
• Consumer items that are cut and polished
• Gear elements