Sorry, K, but you are wrong this time. I also liked MARCHES, but after putting it in and submitting to the Times site, joined the discussion group. Someone commented that they had never heard of the answer to 9a, being a bit of an unusual word. I revisited the clue and the answer is in fact, MORCHAS. M (mass) OR (men) CHAS (anag) MORCHA is an unauthorised protest against government. I was suspicious of the simple answer for the Club Monthly, but didn't go further. LOL