Swindler's infringement of copyright plot (10)
I believe the answer is:
conspiracy
'plot' is the definition.
(I know that conspiracy is a type of plot)
'swindler's infringement of copyright' is the wordplay.
'swindler's' becomes 'con's' (I've seen this in other clues).
'infringement of copyright' becomes 'piracy' (I can't justify this - if you can you should give a lot more credence to this answer).
'cons'+'piracy'='CONSPIRACY'
Can you help me to learn more?
(Other definitions for conspiracy that I've seen before include "Joint action undertaken secretly" , "scheme" , "intrigue" , "that involves plotting" , "Plot" .)