Shout about being taken in by fraud (6)
I believe the answer is:
scream
'shout' is the definition.
(scream is a kind of shout)
'about being taken in by fraud' is the wordplay.
'about' becomes 're' (regarding).
'being taken in by' indicates putting letters inside.
'fraud' becomes 'scam' (scam is a kind of fraud).
're' put into 'scam' is 'SCREAM'.
(Other definitions for scream that I've seen before include "one causes great amusement" , "Shout" , "Piercing yell" , "A long piercing cry as of terror" , "express horror" .)