Related Clues:

• Stranded traveler's signal, perhaps
• Seaman's "Help!"
• . . . — — — . . .
• Bark excitedly
• Clorox cleaning product
• Tar's 'Help!'
• Request for assistance
• ...---...
• SOS
• Information desk offering
• ''Mayday!'' relative
• Second Beatles film
• Call in a calamity
• Urgent call at sea
• Brillo alternative