Con (4)
'con' is the definition.
(both can mean a fraud or scam)
This is all the clue.
(Other definitions for swindle that I've seen before include "fleece" , "Trick" , "Ramp" , "Con, defraud" , "Fraudulent scheme" .)
'con' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for anti that I've seen before include "(Person who is) not in favour" , "'No' voter" , "Definitely not pro" , "Prefix meaniing against" , "on the other side" .)
'con' is the definition.
(both can mean a fraudulent scheme)
This is the entire clue.
(Other definitions for scam that I've seen before include "Screw" , "Fraudulent action" , "Dodgy business" , "Con trick" , "Rip-off" .)
'con' is the definition.
(I know that con can be written as inmate)
This is the entire clue.
(Other definitions for inmate that I've seen before include "One is confined to an institution" , "Inhabitant of prison or hospital" , "One in prison/hospital" , "Person confined to institution" , "Someone confined, eg to hospital or prison" .)
(Other definitions for swindler that I've seen before include "Trickster" , "Con artist" , "Con man" , "Defrauder, scammer" , "Fraudster" .)