Primate produces revolutionary report (7)

I believe the answer is:

gorilla

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'primate' is the definition.
(gorilla is a kind of primate)

I can't explain the rest of the clue.

(Other definitions for gorilla that I've seen before include "A large powerful African ape" , "Aggressive-looking type" , "Large chest-beating ape" , "Primate - sturdily-built aggressive man" , "Largest living primate" .)

I've seen this clue in the Irish Times.

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