Crossword Genius

Fierce word of reproach? (3)

Ross

I believe the answer is:

fie

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'word of reproach?' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

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(Other definitions for fie that I've seen before include "Cry of dismay" , "Shame!" , "Expression of disgust or outrage" , "Yuck!" , "Interjection of disgust" .)

I've seen this clue in the Evening Standard.
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