Possible Clues:

• Most of pack in power make clever observations
• Words of Hope
• Many a tweeted remark
• Witty saying, a wisecrack
• With leader gone, supply witticism
• Crack supply, but no Ecstasy
• Quit after making the last quiet, cutting remark
• Amusing comment
• Steven Wright's 'I intend to live forever. So far, so good,' e.g
• Instance of levity