Related Clues:

• Plate crossings
• Musical scales, e.g.
• Gallops
• Production batches
• Barrels along
• Morse units
• Participates in a marathon
• Pennant quests
• Does a 10K
• Runs fast
• Derbies et al.
• Runs a 10K
• Speed contests
• Sprints, e.g.
• Drags, say