Related Clues:

• Like some confrontations
• How some boxers fight
• Slaving away
• Direct, as a confrontation
• Squabbling
• Jordan vs. Bird, e.g.
• Butting heads
• Engaged
• Hoops game
• Working away
• Like most tutoring
• Going ___ tooth and nail
• Keep ___ (persevere)
• On the job
• One way to slug it out