Related Clues:

• Marathoner's concern
• Display anxiety, in a way
• Horse's motion
• Wear a rut in the rug
• Jockey's concern
• Dueler's unit
• Duel distance
• Part of R.I.P.
• Show nervousness
• Rate of progress
• Go back and forth
• Runner's rhythm
• Marathon measure
• Rate of work
• Show impatience, in a way