Crossword Genius

Prisoner's trick (3)

Ross

I believe the answer is:

con

I believe this is a double definition.

'prisoner's' is the first definition.
(abbreviation for 'convict')

'trick' is the second definition.
(a con is a fraud or trick)

(Other definitions for con that I've seen before include "Informally swindle" , "Have a reason not to" , "one in pen?" , "Direct steering; study" , "This man is a swindler" .)

I've seen this clue in The Times.
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