Possible Clues:

• "Agreed!" ... and what can be said about the start of the answers to starred clues
• Closing words?
• 'Agreed!' ... and what can be said about the start of the answers to starred clues
• "Let's shake on that!"
• What not to say to the bargain offer
• ''You're on!''
• Statement accompanying a handshake
• ''Let's shake on that''
• 'You've convinced me!'
• Cry while shaking hands