Lied about loaf (4)
I believe the answer is:
idle
'loaf' is the definition.
(thesaurus)
'lied about' is the wordplay.
'about' indicates an anagram.
'lied' with letters rearranged gives 'IDLE'.
(Other definitions for idle that I've seen before include "out of a job" , "Inert; lazy" , "Useless" , "Good-for-nothing" , "Frivolous" .)