Related Clues:

• Horse - surprised expression
• Urge on (a horse?)
• Gosh!
• Urge horse - expression of surprise
• Well I'm blowed!
• "___ whiz"
• Gosh, a letter!
• "Color me surprised"
• ''__ whiz!''
• "I never would've thought of that!"
• Head-turning cry
• Surprise up north leaves Arabian spirit in bottle
• "Ahem" relative
• "What's the big idea?!"
• With 60-Down, song by 56-Across