A result of splitting hairs? (7)

I believe the answer is:

parting

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'splitting hairs?' is the definition.
(I've seen this in another clue)

I don't understand the remainder of the clue.

(Other definitions for parting that I've seen before include "splitting up" , "Separating" , "Separation" , "Leaving or dividing" , "Aggressive remarks on leaving (from a 20?)" .)

I've seen this clue in The Globe and Mail.

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