Related Clues:

• Isn't fully vertical
• Fights with a lance
• Leans to one side
• Leans slightly
• Pinball no-nos
• Jousting matches
• Pinball flubs
• Arcade violations
• Isn't quite perpendicular
• Has a list
• Pinball miscues
• Knight games
• Inclines to be quixotic?
• Goes off the perpendicular
• Arcade no-nos