Related Clues:

• Grand Canyon's perimeter
• Fill-up point
• Canyon's periphery
• Part of a cap
• Top edge of something
• Piston ring?
• Tumbler edge
• Lip; part of 6 Down
• Place for a twist of lemon
• Wire __ glasses
• Lip from criminals
• Spills go over it
• Glass's lip
• Something a swish doesn't hit
• Edge: border of hat, not cap