Possible Clues:

• Gives a fitting role
• Prevents an actor from getting a breakthrough role, perhaps
• Confines, theatrically
• Keeps giving cop roles to
• Pigeonholes, theatrically
• Puts in parts that naturally fit old printer's output?
• Lacks imagination in role-filling
• Pigeonholes, in a way
• Puts in an expected role
• Of actors, assigns to familiar kinds of roles