Spends hours at the mirror (6)

I believe the answer is:

preens

(Other definitions for preens that I've seen before include "Trims feathers with beak" , "Titivates" , "Grooms oneself in a vain manner" , "Arranges as a bird does its feathers" , "Grooms, as a bird would" .)

I've seen this clue in The Wall Street Journal.

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