Related Clues:
- Warning by driver heading left or right
- *Announce with great fanfare
- With 18-Across, what a boastful guy might do
- Model train sound
- Honk horn — in both directions
- Megaphone noise
- Be a whistleblower
- Blow on a horn
- Blast back and forth
- Noise from car horns or trumpets
- Sound a car horn
- ''Beep!'' on the ocean
- Brassy horn blast
- Choo-choo sound
- Noise from a toy train