Crossword Genius

Cutters, initially silent (6)

Ross

I believe the answer is:

knives

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'cutters' is the definition.
(knife is a kind of cutter)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for knives that I've seen before include "Cutters" , "Cutting instruments" , "Cutting tools" , "Blades" , "Daggers" .)

I've seen this clue in the Evening Standard.
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