Did some looting - dismissed (6)

I believe the answer is:

sacked

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'dismissed' is the definition.
('sack' can be a synonym of 'dismiss')

I cannot understand how the remainder of the clue works.

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(Other definitions for sacked that I've seen before include "Given one's P45" , "Informally dismissed from job" , "Dismissed or pillaged" , "Dismissed from employment" , "Fired" .)

I've seen this clue in The Irish News.

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