Crossword Genius

Inch of grass with section snipped (4)

Ross

I believe the answer is:

edge

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'inch' is the definition.
(synonyms)

I don't understand how the remainder of the clue works.

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(Other definitions for edge that I've seen before include "Rim - move gradually" , "'Border, boundary, rim (4)'" , "The part farthest from the middle" , "Move furtively; intense quality" , "Sharp side of a blade" .)

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