Related Clues:

• Scary signal
• Plea from the sea
• Castaway's call
• "--- yer old man!"
• Stranded traveler's signal, perhaps
• Seaman's "Help!"
• . . . — — — . . .
• Clorox cleaning product
• Tar's 'Help!'
• Topical application for teens
• __ 10: 109-Down medication
• ...---...
• ''Mayday!'' relative
• Call in a calamity
• Moronic opening