The term 'Good Source of Iron' can be answered by two crossword solutions: ORE (3 letters) and LIVER (5 letters). ORE is a mineral or rock that contains enough metal to make it economically feasible to extract the metal from the ORE. Iron ORE is one of the most abundant elements on Earth, making up about 5% of the Earth's crust. LIVER is an organ found in vertebrates that is responsible for many metabolic processes, including the production of bile and the storage of iron. Iron is essential for the formation of hemoglobin, which carries oxygen throughout the body.