Wiktionary
wardrobe mistress
n. (context performing arts English) A woman in charge of the procurement, maintenance, and inventory of the costumes and other clothing worn by performers.
Usage examples of "wardrobe mistress".
The wardrobe mistress picked up the telephone receiver and held it to her ear.
She was a wardrobe mistress, not an actress, and yet once the sun lit her huge deep-set eyes, everyone else seemed made of cardboard.
The clothes still had a sheen of newness about them and looked as though they'd been picked by a wardrobe mistress according to a script adviser's list.
Then she got work at Mosfilm as a wardrobe mistress,' Arkady said.