Expert
Professional, Specialist, Woman Of The Red Light District
noun, の adjective
くろうと
素人 probably comes from white 白い 玄人 probably comes from black 黒い
The と in 素人 and 玄人, and the ど in 狩人, probably derive from 人 ひと
The path to becoming an Expert 玄人 くろうと is full of Hardships 苦労 くろう