Possible Clues:

• Patron saint of tanners
• The French fellows in court could be gentle
• Mild adhesive covering back of label
• The French soldiers are in court for showing mercy
• It's all very fine for a pope
• Mild and pleasant
• What a mercy it is to be called to be a pope
• Merciful opponent of Winston?
• Mild Mr Attlee
• Pope once left trapped by gum!