stand-in
(Informal)
[noun]
Synonyms: substitute, deputy, locum, replacement, reserve, stopgap, surrogate, understudy

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Related Words: second, assistant

[TahlilGaran] English Synonym Dictionary ▲

stand in phrasal verb (see also stand)
to temporarily do someone else’s job or take their place ⇒ stand-in
stand in for
Would you mind standing in for me for a while?

[TahlilGaran] Dictionary of Contemporary English ▲

ˈstand-in 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 stand¹

[TahlilGaran] Dictionary of Contemporary English ▲