Related Clues:

• It's set by a runner
• Go to and fro
• Act the expectant father
• Rate of walking speed
• Going rate
• Pick it up if you're behind
• Walk nervously
• About 2 1/2 feet for humans, I suppose
• Trotter's rhythm
• Double-quick, e.g.
• Rate of speed
• Wear a hole in the rug
• Horse's gait
• Rate of movement
• A lap a minute, e.g.