Trousers

Trousers were an item of clothing typically worn to cover the legs. A suit which included trousers was known as a trouser suit.

The Sixth Doctor typically wore trousers with yellow stripes. While acting as his successor, Jack Harkness wore the Sixth Doctor's coat along with his seventh favourite waistcoat and yellow-stripped trousers. (AUDIO: Piece of Mind)

The Thirteenth Doctor wore teal capri trousers. (TV: The Woman Who Fell to Earth-The Power of the Doctor) She also wore black trousers as part of her tuxedo. (TV: Spyfall)

Barbara Wright wore black trousers with her jumpers. (TV: The Keys of Marinus, The Web Planet, The Space Museum, The Chase, etc.)

Sarah Jane Smith gained camouflaged trousers from Skaro during the Dalek's origins, (TV: Genesis of the Daleks) and also wore it during her first encounter with Cybermen. (TV: Revenge of the Cybermen)

Nyssa wore a trouser suit of plum velvet. (PROSE: Four to Doomsday, Earthshock, Time Flight, Arc of Infinity)

Tegan Jovanka wore Prussian blue trousers during the Master's Dalek Plan. (TV: The Power of the Doctor)

At Coal Hill School in the 1960s, girls were not permitted to wear trousers. Basil James Carker, the headmaster, had turned down dozens of petitions that girls be allowed to wear trousers to school. They instead had to wear skirts or tunics. Susan Foreman commented in her diary that "[she thought] he'd be happiest if we had to wear Mohammedan veils and Idaho potato-sacks". (PROSE: Time and Relative)

Ianto Jones used a trouser press. (AUDIO: Believe)

Cathy Salt wore a brown trouser suit. (TV: Boom Town)

While investigating Adipose Industries in 2009, Donna Noble wore a black trouser suit on Wednesday. Penny Carter wore a grey trouser suit. (TV: Partners in Crime)

Allison Williams wore tan trousers when she helped the Seventh Doctor during the Hand of Omega Incident. (TV: Remembrance of the Daleks)

Having sustained a severe leg wound, blood was spread across Stella's trousers. (PROSE: Prisoner of the Daleks)

When working with the thermocoupling]s in the Doctor's TARDIS, Rory Williams became distracted by Amy Pond's skirt, visible through the glass floor, and dropped the coupling, causing the TARDIS to materialise inside itself. (TV: Space) After the mess had been sorted, the Eleventh Doctor told Amy to put some trousers on. (TV: Time)

Information from invalid sources
Deborah (as played by Minnie Driver in the Doctor Who serial Father Time) had a "dowdy" appearance, as described by a costume designer, executed using unflattering jumpers and corduroy trousers. (NOTVALID: Father Time: "Set Visit")