'Clear Conscience' in the Bible

But do this gently and respectfully, keeping a clear conscience, so that those who speak evil of your good conduct in the Messiah will be ashamed of slandering you.

Corresponding to that [rescue through the flood], baptism [which is an expression of a believer’s new life in Christ] now saves you, not by removing dirt from the body, but by an appeal to God for a good (clear) conscience, [demonstrating what you believe to be yours] through the resurrection of Jesus Christ,