ˈstand-in BrE AmE noun [countable]
1 . someone who does the job or takes the place of someone else for a short time:
Gilbert failed to find a stand-in and so could not go to the party.
2 . someone who takes the place of an actor for some scenes in a film
stand-in for
a stand-in for Tom Cruise
⇨ stand in at ↑ stand 1