Corduroy

The Curator, in a form resembling an older Sixth Doctor, wore a mustard yellow corduroy waistcoat. (AUDIO: Crossed Lines)

The Eighth Doctor wore an old brown corduroy suit on 1951. (PROSE: Endgame)

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. (PROSE: )