Transgression committed by edgy intern a little bit afterwards (10)

I believe the answer is:

infraction

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'transgression' is the definition.
(infraction is a kind of transgression)

I cannot understand how the rest of the clue works.

(Other definitions for infraction that I've seen before include "transgression" , "Breach of agreement" , "Violation of law" .)

I've seen this clue in The Irish Times.

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