Stage garment (5)
I believe the answer is:
apron
I believe this clue is a double definition.
'stage' is the first definition.
(I know that apron is a type of stage)
'garment' is the second definition.
(I have seen 'Protective garment' mean 'apron' so perhaps 'garment' could also mean 'apron')
(Other definitions for apron that I've seen before include "Protective kitchen wear" , "something befitting kitchen-sink drama?" , "Kitchen garment or airfield area" , "that's used by Oliver!?" , "Put on to protect" .)