Related Clues:

• Sultry singer
• Pump kin
• Fizzless, as a Coke
• One way to be turned down
• Needing tuning, maybe
• Engine sound?
• Needing a 1-Across
• Fire indicator, perhaps
• Alluring woman
• In need of tuning
• Police car's sound
• Needing to get keyed up?
• ''All clear'' signal
• Ambulance signal
• Fire engine's warning