Thomas —, author of 1843 poem The Song of the Shirt (4)
I believe the answer is:
hood
(Other definitions for hood that I've seen before include "Outlaw and gangster" , "Cover < the upper part < of tough" , "A cover; Bismarck sank it, 1941" , "Cowl -- violent criminal (slang)" , "Thomas -, Eng. poet" .)