Possible Clues:

• Simply without a bean in there
• Pure lack of time when continent's in upheaval
• Naive or not guilty
• Without sin
• Get round in pub with very little money? That's naïve
• Harmless or guiltless
• Free from sin
• At home, no American money is free of sin
• Plead in 7 down that one has no money for the hotel
• Naive person seen in pub with no money