Related Clues:

• Pastoral sound
• Stall call
• 'No' vote from a horse?
• Arab's greeting
• Sound on Old MacDonald's farm
• Speak in a horse voice
• Horse sound
• Equine sound
• Sound at 44-Across, maybe
• Whinny
• Equine noise
• Sound from a bay
• Stable sound
• Bay sound
• It comes straight from the horse's mouth