in (someone's or something's) stead

As the representative of someone or something; in place of someone or something. (Typically used in slightly more formal language.) The boss isn't here at the moment, but I'd be happy to sign for the package in her stead. My horse was stolen, so I am forced to ride this donkey in its stead. Janet is really sick, so I'm going to lead the meeting in her stead.

in somebody’s/something’s ˈstead

(formal) instead of somebody/something: Foxton was dismissed and John Smith was appointed in his stead.