The crossword solution for the term SQUID WEAPON is INK. INK is a liquid or paste that contains pigments or dyes and is used to color a surface to produce an image, text, or design. It is most commonly used for writing, drawing, and printing. INK can also be used for painting and other artistic applications. In the context of SQUID WEAPON, INK is used as a defensive mechanism by squids to ward off predators. Squids can release a cloud of INK to confuse predators and give them time to escape.