What's the noun for cassocked? Here's the word you're looking for.
cassock
(obsolete) A military cloak or long coat worn by soldiers or horsemen in the 16th and 17th centuries. [16th-17th c.]
(obsolete) A coarse, loose cloak or gown, worn by women, sailors, shepherds, countryfolk etc. [16th-17th c.]
An item of clericalclothing: a long, sheath-like, close-fitting, ankle-length robe worn by clergy members of some Christian denominations. [from 17th c.]