From Longman Dictionary of Contemporary Englisha clear consciencea clear conscienceGUILTY/FEEL GUILTYthe knowledge that you have done the right thing and should not feel guilty I don’t think I could vote for him with a clear conscience. She had done what she could and her conscience was clear. → clear
Examples from the Corpus
a clear conscience• Now they could dance with a clear conscience.• Sophie and the child will be taken care of, and because of that I can live with a clear conscience.• Let them say whatever they like. I have a clear conscience.• And who has a clear conscience?• But at any rate I can finally dust my hands and put my jacket on with a clear conscience.• He feigned a teasing laugh, a clear conscience.• My understanding of shareware is that it can be freely distributed but requires registration by the user for a clear conscience.• A Clear Conscience A close companion to a forgiving spirit is a clear conscience.• Smith says he has a clear conscience about what happened.• Finley said that he had a clear conscience and that the charges were unfounded.• They could claim, with a clear conscience, that their feet had never left Ross-shire soil.• You can face Lionel with a clear conscience -- you've done nothing to harm him. 