Possible Clues:

• Clever like Dickens's Dodger
• Description of packed gallery, perhaps -- almost masterly
• Clever description of a well-stocked gallery?
• Partially smart, fully sly
• Like Jack Dawkins, Rex admitted to terrible fault
• Painting class at university in Florida is deceptive in a crafty way
• Play around with fault covering resistance - that's clever
• Skilled
• Like master works
• Scheming