Stiffened undergarment (6)
I believe the answer is:
corset
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stiffened undergarment</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 corset that I've seen before include "Stiffened undergarment" , "female garment!" , "Sector (anag)" , "Stiff supportive undergarment" , "Female undergarment" .)