Answer: whitewashing

AnswerCrossword Clue
whitewashingTry to clear (someone or their name) by deliberately concealing their mistakes or faults
whitewashingWHITEWASH, to cover with whitewash
whitewashingDefeat (an opponent), keeping them from scoring
whitewashingDeliberately conceal (someone's mistakes or faults)
whitewashingPaint (a wall, building, or room) with whitewash