Swindled revolutionary at English dockside (7)
I believe the answer is:
cheated
'swindled' is the definition.
'revolutionary at english dockside' is the wordplay.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'english dockside' becomes 'ed' (this might be a standard abbreviation which I don't know about).
'che'+'at'+'ed'='CHEATED'
Can you help me to learn more?
(Other definitions for cheated that I've seen before include "Behaved dishonestly" , "Defeated through deceit" , "taken for a ride" , "stung" .)