Apron
An apron was a protective garment worn over the front of one's clothes and tied at the back.
The Silurian scientist, Malohkeh, wore a black apron when doing lab work. (TV: The Hungry Earth / Cold Blood)
Rose Tyler wore a white waist apron when posing as a waitress during her first encounter with Cybus Cybermen. (TV: Rise of the Cybermen|The Age of Steel)
Ace wore a white apron when working as a waitress on Iceworld when she met the Seventh Doctor. (TV: Dragonfire, PROSE: Cat's Cradle: Witch Mark)
Clara Oswald wore a white waist apron when her TARDIS masqueraded as a 1950s American diner following the Twelfth Doctor losing his memory of her. (TV: Hell Bent)
Astrid Peth wore a white waist apron when she met the Tenth Doctor. (TV: Voyage of the Damned)
The Toymaker wore an apron of caramel brown leather in Soho during 1925. (TV: The Giggle)