Related Clues:

• Go back and forth
• Dueler's distance
• Runner's rhythm
• Marathon measure
• It may be a step up
• Rate of work
• Show impatience, in a way
• Prepare to duel
• The 'P' in a Latin R.I.P.
• Trot or gallop
• It connects levels
• Path between floors
• Show worry
• Riser plus tread
• Stride rate