Hairnet (5)
I believe the answer is:
snood
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hairnet</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for snood that I've seen before include "Hairnet; headband" , "Loose hairnet" , "Loose cover" , "Nod so violently and it might fall off a girl's head" , "pouch" .)