stand-in

stand in — phrasal verb with stand verb uk/stænd/ uspast tense and past participle stood
to do something that someone else was going to do because they cannot be there

заменять кого-либо
She stood in for me when I was sick.

STAND-IN noun

[ C ] uk/ˈstændɪn/ us
someone who does what another person was going to do because the other person cannot be there

дублер, замена