Answer: scouring

AnswerCrossword Clue
SCOURINGCleaning.
SCOURINGType of pad
SCOURINGUsing elbow grease
scouringRemove (dirt or unwanted matter) by rubbing in such a way
scouringscrubbing
scouringAdminister a strong purgative to
scouringClean or brighten the surface of (something) by rubbing it hard, typically with an abrasive or detergent
scouring(of water or a watercourse) Make (a channel or pool) by flowing forcefully over something and removing soil or rock