Related Clues:

• Rainbow, e.g.
• Curvature
• Gothic doorway shape
• Military doctor's concern
• McDonald's symbol
• Paris landmark
• Sight on the Champs Elysees
• Prefix with conservative
• Foot portion
• Sole's curve
• Spot for a keystone
• Fingerprint feature
• Grand entrance
• Keystone spot
• Sole support?