(US, British, informal, dated) Clothing, especially for work or of rough appearance.
1890, William Morris, News from Nowhere, in the journal The Commonweal. (First published in book form 1890.)
I looked at what I could see of my rough blue duds, which I had plenty of opportunity of contrasting with the gay attire of the citizens we had come across;[…]
1913, Joseph C[rosby] Lincoln, chapter VII, in Mr. Pratt’s Patients, New York, N.Y.; London: D[aniel] Appleton and Company, →OCLC: