Cut hairs in ear? (3)

I believe the answer is:

mow

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'cut' is the definition.
(as in mowing a lawn)

I don't understand the rest of the clue.

(Other definitions for mow that I've seen before include "Cut (e.g. grass)" , "Cut grass or grain" , "'Cut, grass say (3)'" , "Cut grass on lawn" , "Scythe" .)

I've seen this clue in the Sydney Morning Herald.

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