Hair line (4)

I think it could be either:

Which length description are you looking for?:

part

'hair line' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for part that I've seen before include "goodbye" , "Some; break" , "unemployed actor hopes for" , "Fraction of the whole - separate" , "Bit - leave" .)

I've seen this clue in the Universal and the USA Today.

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