Clue: Announcement of 3.15 warning for statesman? (6,3,4,2,5)
Answer: BEWARE THE IDES OF MARCH
Explanation: Definition: warning for statesman
Double definition – 3.15 (in the American style) is the 15th or Ides of March, the day Julius Caesar was warned about by the soothsayer. I got this answer early on, which helped with the clues linked to MARCH at 9, but didn't make them complete write-ins.