Quack, fraud (9)
I believe the answer is:
charlatan
I believe this is a double definition.
'quack' is the first definition.
(I've seen this in another clue)
'fraud' is the second definition.
(I've seen this in another clue)
(Other definitions for charlatan that I've seen before include "ake" , "Quack, fraud, a flamboyant deceiver" , "Impostor, deceiver" , "Flamboyant deceiver, mountebank" , "Impostor, quack" .)