Rabble-rousing leaves initial impression (7)

I believe the answer is:

edition

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'impression' is the definition.
(edition is a kind of impression)

I cannot understand how the rest of the clue works.

(Other definitions for edition that I've seen before include "Volume" , "Copy - I tied on (anag)" , "Particular form of a published text" , "Total number of copies issued (of book)" , "Version of a publication" .)

I've seen this clue in The Telegraph.

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