The term 'Hammer and Anvil Site' refers to a type of archaeological site that is characterized by a large stone hammerstone and an anvil stone. This type of site is typically found in areas where ancient people used stone tools to process materials such as animal hides, wood, and bone. The crossword solution for this term is EAR, which stands for 'Experimental Archaeology Research'. This type of research involves the use of experimental archaeology techniques to study ancient technologies and processes.