explain something away
phrasal verb with explain verb [ I or T ] uk/ɪkˈspleɪn/ us/ɪkˈspleɪn/
为…辩解;对…加以解释以减轻其严重性（或避免被指责等）
to avoid blame for something that has happened by making it seem not important or not your fault
I don't know how you're going to explain away that dent you made in Dad's car. 你把爸爸的车撞出了个坑，我看你怎样解释才能过这一关。