Related Clues:
- It's left behind in good restaurants
- Line on a bill
- Message frantically tapped out
- Mayday call
- Trackside advice
- Skipper's plea
- Help wanted sign?
- Only hit song for which title and artist are both palindromes
- An obvious cry for help
- End of another actor's line, maybe
- Coded plea
- Sea call
- Morse code message
- Pool item
- Sinking signal