Tell it like it isn't (3)
I believe the answer is:
lie
'tell it like it isn't' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lie that I've seen before include "buried" , "Equivocate" , "Fib - be prone" , "Be prone - misrepresent the facts" , "Disinformation" .)