The crossword solution for the term 'IT'S IN BRASS' is ZINC, which is a chemical element with the symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed. ZINC is an essential trace element for many life forms, including humans, and is found in a variety of foods. It is also used in the production of brass, an alloy of copper and ZINC.