Possible Clues:

• It comes as a revelation to whip if on scones
• If no scones, bake - it'll come as a revelation
• Father is bound to hear this is a revelation
• Tolstoy admitted it
• Interrogator's goal
• Whodunit denouement
• Acknowledgement of sins once out of order
• Face one's sin with difficulty, avoiding a revelation?
• Admission one's used iron to knock out copper in dazed reaction to blow