Related Clues:

• Representing (with "on")
• Whodunit plot element
• 'I was at home washing my dog,' e.g.
• Defense aid
• Knight's burden
• Out of sorts?
• Cop's badge
• Gladiator's need
• Excuse in court
• Suspect's claim
• Legal excuse
• Alleged perp's defense
• Court excuse
• It could be a strong defense
• "I was asleep," for one