'Clear' in the Bible

Did Abraham not say to me, 'She is my sister'? And she herself said, 'He is my brother.' I have done this with a clear conscience and with innocent hands!"

Then in the dream God replied to him, "Yes, I know that you have done this with a clear conscience. That is why I have kept you from sinning against me and why I did not allow you to touch her.

Judah replied, "What can we say to my lord? What can we speak? How can we clear ourselves? God has exposed the sin of your servants! We are now my lord's slaves, we and the one in whose possession the cup was found."