Related Clues:

• Bill has no time for puzzle
• Bill taking time out to be a model
• Problem, loosening ropes
• Attitudiniser
• A problem subject for artist
• Puzzle writer's style put right at last
• Model that may make one scratch one's head?
• Problem about placatory gift being sent back
• Morse regularly cracks a difficult puzzle
• It makes you think
• It's hard to answer for a model
• It's a problem to sit right
• Sit on year end problem
• Ropes (anag.)
• Return more sophisticated, concealing the problem