Possible Clues:

• Showing skill, young Arthur is endlessly shown to be correct
• Aesthetic painter sick at heart
• Pleasingly drawn
• Having creative gifts
• Having a creative imagination
• It turns its back in a curve that is aesthetic
• I stir cat (anag.)
• It's hidden in lorry - crafty!
• It's creative to rummage around the attic, sir
• At last, painter in garret is held to be cultivated