The crime Roger is jolly about? (6)

I believe the answer is:

piracy

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'the crime' is the definition.
(piracy is a kind of crime)

I can't explain the rest of the clue.

(Other definitions for piracy that I've seen before include "Maritime or commercial robbery" , "Illegal copying" , "Robbery at sea or of copyright" , "Act of plagiarism" , "Crime" .)

I've seen this clue in the Evening Standard.

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