Possible Clues:

• Cad
• Rogue; scamp
• 'Little' one of old TV
• “When the Honours List is full of ____s, millionaires, and—er—chumps, you may be quite sure that the Government is seriously ill” (Arnold Bennett)
• Incorrigible sort
• Wee imp
• Rogue artist's style is detailed
• Mischievous fellow
• In character, a scallywag?
• Troublemaker, a scallywag at heart