Laundry room supply (6)
I believe the answer is:
bleach
'laundry room supply' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bleach that I've seen before include "Make white by sun or chemicals" , "Peroxide" , "Caustic material" , "Whiten with a belch" , "Make white or faded" .)