The cluse to 4 down is "Parking brake for a Ballot". I have "A?C?O?"and the obvious answer seems to be "ANCHOR" which could refer to a parking brake. However, how does that specifically relate to "Ballot" - looking at it as the the name of the French motor car made between 1921 and 1932 or as another word for a vote or election? Does "Anchorman" perhaps have some significance in the electorial sense?