Cleaning pad (7)
(Other definitions for scourer that I've seen before include "Abrasive kitchen pad" , "One searching" , "item of kitchen equipment" , "Kitchen cleaner" , "one employed to wash pots?" .)
(Other definitions for sponge that I've seen before include "Light cake; aquatic invertebrate" , "Sea animal often found in bath" , "Heavy drinker" , "Piece of porous rubber" , "Parasite" .)