Possible Clues:

• Penitent habit of clergy after dismissal
• With ashes, it was a symbol of remorse
• With ashes, it's a sign of repentance
• Dismiss ministers, a sign of contrition
• Unfrock the priest? For shame!
• Fire the clergy as part of repentance
• The stuff repentance is made of
• Garment of penitence
• Nineteen hundred unwilling to provide a show of repentance
• Loot demanded by clergy, being material