The term 'Hoover, etc.' refers to a group of people who have held the office of President of the United States. The most notable of these is Herbert Hoover, who served from 1929 to 1933. Other presidents in this group include Calvin Coolidge, Warren G. Harding, and Franklin D. Roosevelt. The crossword solution for this term is 'DAMS, ' which stands for the first letters of each of their last names: Hoover, Coolidge, Harding, and Roosevelt.