Fact fudger (4)
I believe the answer is:
liar
'fact fudger' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for liar that I've seen before include "Fabricator" , "Worse than a thief" , "One not telling the truth" , "Untruthful person (Billy in Schlesinger film)" , "not straight [one]" .)