Do, as hair (5)
I believe the answer is:
style
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">do as hair</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for style that I've seen before include "Superior quality" , "Pointed pen" , "Chic" , "Distinctive arrangement, elegance" , "Fashion or way of doing things" .)