Sentence:  In one of the aisles there was an elaborately carved confessional box and I recognised the village priest in his heavy mountain boots and black <WSD>cassock</WSD> as he entered it and drew the dark velvet curtains behind him. 
Meaning of the word marked with <WSD> tags:  An item of clerical clothing: a long, sheath-like, close-fitting, ankle-length robe worn by clergy members of some Christian denominations. (from 17th c.)