Related Clues:

• Replace, in a way
• Play the part of
• Perform the function of
• Substitute for
• Take the part of
• Take on the role of
• Have the role of
• Perform the duties of
• Fill the role of
• Serve in place of
• Attend to the duties of
• Portray the role of
• Be a proxy for
• Assume the part of
• Portray in a film, say