Related Clues:

• Warning at sea
• Beautiful swimmer
• Signal to pull over
• Park lake denizen
• Lohengrin, the Knight of the ___
• 'All clear' signal
• It's heard on 'Cops'
• Composer's creation
• Melody
• Trumpeter in the park
• Recurring melody
• Word with dive or song
• Car alarm?
• Cob or pen
• Subject