Possible Clues:

• Difficult problem for one who has airs and graces
• Puzzle or fashion model
• Someone behaving so as to be noticed
• Bill taking time out to be a model
• One pretending to like trendy music, say
• A problem subject for artist
• Attitudiniser
• Hard question or subject for artist
• 'Cheese' sayer
• Queen's 'Under Pressure' with huge exhibitionist