1. A shoe that is free from dirt, stains, or contamination; literally a clean shoe
He polished his shoes until they were spotless clean shoes.
Ele engraxou seus sapatos até ficarem sapatos limpos impecáveis.
2. (figurative, slang) A person with a clean record; someone without criminal history or moral blemish
He's a clean shoe - never been in trouble with the law.
Ele é um sapato limpo - nunca teve problemas com a lei.