Misrepresentation (6)
I believe the answer is:
deceit
'misrepresentation' is the definition.
(I know that deceit is a type of misrepresentation)
This is all the clue.
(Other definitions for deceit that I've seen before include "Falsehood" , "Deliberate misrepresentation" , "Fraud or duplicity" , "Lying" , "Duplicity or trickery" .)