Hats (9)
I believe the answer is:
millinery
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hats</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 millinery that I've seen before include "Women's hats, ribbons etc." , "Women's headgear" , "Hat and trimmings" , "hat shop" .)