Related Clues:

• It's hard to get out of
• Teaching style
• Deep groove
• Monotonous practice
• Memory work
• Tiresome grind
• Concavity
• Unthinking repetition
• Long groove
• Endless 9-to-5 job, e.g.
• Track in the ground
• It's boring to be in one
• ___ memory
• You might get in this at work
• One way of learning by