Possible Clues:

• Prudent giving it into keeping of constabulary, for the most part
• Was the river set on fire in a diplomatic manner?
• Cut up over it, I see, with diplomacy
• Prudent, judicious
• Prudent and courteous, finally left in charge
• What a tactful coil with a twisted tip!
• It would be tactful for the parrot to make the sound of a clock, by the sound of it
• Wise, cautious
• Judicious
• Prudent - type of body