Terrifying woman doesn't need PR in advance! (6)

I believe the answer is:

ogress

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'terrifying woman' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for ogress that I've seen before include "Monstrous female" , "Monstrous woman" , "Frightful woman" , "Terror" , "Female giant in fairy tale" .)

I've seen this clue in The Irish Independent.

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