The porter has less on, it's said (6)
I believe the answer is:
bearer
'the porter' is the definition.
(thesaurus)
'has less on it's said' is the wordplay.
'has less on' becomes 'barer' (wearing less clothing).
'it's said' indicates a 'sounds like' (homophone) clue.
'barer' is a homophone of 'BEARER'.
(Other definitions for bearer that I've seen before include "Coffin carrier (one paid on demand?)" , "agent" , "One who carries, maybe a coffin" , "Mourner carrying the coffin at a funeral" , "He carries something, stretcher or news" .)