Possible Clues:

• Switch a cream pie when no one's looking
• Heard but not seen, as sound effects
• Heard but not seen, maybe
• Is not working for film producer going there? To avoid getting shot!
• US labour leader, once topless, eating whipped cream when not being filmed
• Spoiled a cream treat - it's why the director missed it
• Summary of artist's stage exit is not recorded
• It's happening but not on television
• Projection in present article not being filmed
• Unseen