Pinny (5)
I believe the answer is:
apron
'pinny' is the definition.
(I've seen this before)
This is the entire clue.
(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" .)