Related Clues:

• One-on-one combat
• Alexander Hamilton's last act
• It may begin with a slap in the face
• Climactic scene in 'Hamlet'
• A slap may invite one
• One handling hot things?
• Fight in a western
• Hot stuff handler
• Where seconds are important
• It often has two seconds
• One who handles hot stuff
• Barrier
• It's often about a yard
• Property boundary, perhaps
• Hot property dealer