Related Clues:

• Spreading device
• Keyboard bar
• Plane, for one
• Smoothing device
• Orthodontic gadget
• Tying run, for instance
• Text separator
• Orthodontic device for separating teeth
• Less lopsided
• Device to keep things apart
• Less bumpy
• Carpenter's gap-maker
• Dental appliance
• Leveling tool, e.g.
• It's just filling in