Related Clues:

• Track impediment
• This can be monotonous
• ''Business as __''
• Tiresome routine
• Wagon wheel groove
• It's hard to get out of
• Quotidian
• Deep groove
• Monotonous practice
• Quite ordinary
• Tiresome grind
• Concavity
• Long groove
• Endless 9-to-5 job, e.g.
• Track in the ground