settlement (of a matter); sorting out; winding up (affairs); dealing with the aftermath
cleaning up afterwards; tidying up (when finished)
パーティーの後始末に追われた。
We were swamped with the party cleanup.
システム障害の後始末をした。
I dealt with the aftermath of the system failure.
祭りの後始末はボランティアが手伝ってくれた。
Volunteers helped with the cleanup after the festival.