Related Clues:

• Tool in Photoshop
• Meridian shower
• Stationer's item
• Spherical object
• Bard's theatre
• Chalkboard complement
• Slip hider
• Spherical map
• Tip for an exam taker?
• One way to take back one's words?
• It clears the slate
• Model of the Earth
• Corrective tool
• Solver's "undo" implement
• Blackboard accessory