Possible Clues:

• "End of discussion!"
• Discussion ender
• Abrupt discussion ender
• We've heard enough of politician retiring over leader's reading of public initiative
• "You need to let this go"
• ''Change the subject''
• 'Move on!' ... or how to decipher the 16 starred clues
• "Let that go!"
• "That'll be enough of that subject" ... and a hint to solving the answers to starred clues
• 'That'll be enough of that subject' ... and a hint to solving the answers to starred clues