Barber's concern (4)
I believe the answer is:
'barber's concern' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hair that I've seen before include "It grows from the skin" , "It grows from a follicle" , "Showy garden flower" , "Musical with nude scenes" , "Filament growing from the skin" .)