Pinny (5)
I believe the answer is:
apron
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pinny</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 apron that I've seen before include "Kitchen garment or part of airfield" , "Projecting stage" , "Part of stage, boxing ring or airport terminal" , "Garment for protection" , "Kitchen garment or aerodrome strip" .)