Related Clues:

• Nose, so to speak
• Rhinoceros protuberance
• Highway honker
• Bull _____
• Hirt's companion
• See 2 Down
• Bill for birdseed?
• It may be used before an accident
• Duck's prominence
• Avian bill
• You might sit on it in your car
• Traffic jam honker
• Klaxon
• A driver may lay on it
• It's heard on the street