Related Clues:

• His professionalism may be brought into play
• Soliloquy speaker
• Person of parts
• To whom 'break a leg' is said
• One in a cattle call
• Co-star, possibly, if not front of stage?
• One for whom work is play?
• Person in a trailer, in two senses
• Outstanding Supporting ___
• One's job is delivering someone else's work
• A cold starter of turkey or ham?
• Penn or Pitt, e.g
• Perhaps Guinness works to eliminate boundaries?
• One with billing issues, perhaps
• One with a role to play