The term 'hammer out, say' can be solved by the crossword solution 'FORGE'. To FORGE something means to shape it by hammering it into a desired form. This is usually done with metal, but it can also be done with other materials such as wood or plastic. The process of forging involves heating the material until it is malleable, then using a hammer and anvil to shape it into the desired form. Forging is an ancient technique that has been used for centuries to create tools, weapons, and other objects.