Related Clues:

• Horse's halter
• Part of a bray
• Stop
• See 22-Across
• Turn left
• Hem's partner
• See 20-Across
• Rider's 'Stop!'
• Appear indecisive
• 'Stop!'
• 'Holy smokes!'
• Hesitate
• 'No way!'
• 'Hold it!'
• Bit of hesitation