Possible Clues:

• It's rare to get under over anything finished like this
• Fellow European that may be said to seal a deal
• Puzzle solver's happy shout
• Cry made while wiping the hands
• Conned by academic with bearing
• Just over five hundred, perhaps, and you're finished
• Finished with 501?
• High-ranking Mafioso has enemy leader polished off
• ___ deal
• Explore Tyneside? It's a deal!