Crossword Genius

PC swap in Prime Suspect investigated for this (5)

Ross

I believe the answer is:

crime

'suspect investigated for this' is the definition.
(someone may be suspected of a crime)

I don't understand the remainder of the clue.

(Other definitions for crime that I've seen before include "Violation of law" , "An act punishable by law" , "Punishable deed" , "Illegal deed" , "A serious offence" .)

I've seen this clue in The Guardian.
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