Possible Clues:

• Reduce run for one travelling to work
• Firm with formal man boxing silent type on bus
• Regular traveller who reduces time, perhaps?
• One travels a distance between home and work
• One who substitutes for a traveller of some standing, perhaps?
• One may train each day before and after work
• Merciful judge, one who regularly trains?
• Starting crossword on my morning uptown train, everyday routine for me
• 100 Frenchmen in supply route travelling to work
• UberPool participant