Dishonest one (4)
I believe the answer is:
liar
'dishonest one' 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 "one telling a story" , "Bearer of false witness" , "27 [DECEIVER]" , "one trying to sell pork pies" , "Dishonest person" .)