Sentence:  The semiotics of the <WSD>singlet</WSD> - immediately identifiable in Australia, especially in its usual shade of blue, with male manual labourers16 - underlines the contrast between the effete fakery of ballroom costumes and real masculinity to be found underneath or in the world of folk dancing. 
Meaning of the word marked with <WSD> tags:  A vest; a sleeveless garment with a low-cut neck, often worn underneath a shirt.