Do some analytical piecework? (7)

I believe the answer is:

dissect

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'do' is the definition.
Although both the answer and definition are verbs in their base form, I cannot see how one could define the other.

I don't understand the remainder of the clue.

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(Other definitions for dissect that I've seen before include "Anatomize" , "Cut open or cut apart" , "Critically examine" , "Examine minutely" , "Analyse (something) in minute detail" .)

I've seen this clue in The Globe and Mail.

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