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