work clothes; business attire
Clothing worn for work, ranging from uniforms and overalls to business suits. The context determines whether it refers to manual labor wear or office attire.
At the factory, I change into work clothes.
I bought new business attire for tomorrow's interview.
スーツ is a loanword for a business suit, whereas 仕事着 can refer to any work-related clothing, including suits.
Compound of 仕事 (work) and 着 (clothing).