Related Clues:

• Distress signal
• Smidgen
• 'The Racer's Edge'
• Nascar sponsor
• Indy 500 letters
• Help wanted advertisement?
• This puzzle's theme
• Popular oil additive
• 'Help!'
• 'Send help!'
• Letters of urgency
• Urgent call
• Kind of pad
• Race car sponsor
• Exorbitant