Possible Clues:

• Being careless is responsible for United getting relegated
• America turned into one of its states — not smart!
• Like Friday attire in some offices
• Careless sixty per cent of victims
• Laid-back Corinthian's teammate?
• A Lucas production of The Devil May Care
• A Lucas production of The Devil May Care?
• The wounded, removing constraints, relaxed
• Julius Caesar got rid of juries - how blas? is that?
• Like a gamer who plays for fun