결자해지가 · 결자해지를
whoever causes a problem should solve it; the one who tied the knot must untie it
Example
결자해지의 자세로 이번 문제를 직접 해결하겠습니다.
Since I caused this problem, I'll take responsibility and solve it myself.
Word parts
결 tie+자 person+해 untie+지 it
Literally 'the one who tied it unties it.'
Good to know
Common in politics and news: 결자해지 차원에서 'as a matter of cleaning up one's own mess.'