Related Clues:

• Dinner signal
• See 23 Across
• Phone pioneer
• School kids react to it
• Quasimodo's concern
• BCE word
• Plath's ''The ___ Jar''
• It uses a clapper
• Half-hour unit of nautical time
• Round-ending signal
• Bout ender
• It starts the NYSE
• Bike accessory
• Bossy's ringer
• Steeple contents