Related Clues:

• See 15 Down
• It's left to horses
• See 120 Down
• Oxcart driver's shout
• Back end of a bray
• Turn to the left
• Betray a lack of confidence
• Partner of 32-Down
• Speech hesitation
• Hem and ___
• 'Yee-___!'
• Hem partner
• "Hee" follower
• Command to a plow horse
• "Yee-___!"