Possible Clues:

• Clinch a deal, in slang
• Nail down the deal
• Clinch a victory
• Seal the deal, in slang
• Clinch the game, in slang
• Sew up a situation
• "You should get a cold pack on that sprain"
• Advice for treating a sprained ankle
• Seal the win
• Clinch the deal, informally