How extremists speak? (5)

I believe the answer is:

utter

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'speak?' is the definition.
(I know that speak can be written as utter)

I can't explain the rest of the clue.

(Other definitions for utter that I've seen before include "Speak, articulate" , "Express; complete" , "Total - speak" , "Absolute - state" , "Dead" .)

I've seen this clue in The Irish News and The Irish Independent.

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