Related Clues:

• Press, as a doorbell
• Shape of a benzene molecule
• Annulus
• Part of a wedding ceremony
• Phone call
• One of three, at a circus
• Toll, as a bell
• Circus or wedding staple
• Symbol of a commitment
• Go canvassing, say
• Decoding item
• Piece of jewellery
• Circular band of metal
• Sound a doorbell
• Make sound like phone