Turn to dust is a phrase that describes something that has been destroyed or broken down into small pieces. The crossword solution for this phrase is 'CRUMBLE, ' which means to break down into small pieces. Crumbling is a process that can be caused by natural forces such as wind, water, and gravity, or by human activities such as construction or demolition. It is often used to describe the breakdown of physical objects, but it can also be used to describe the breakdown of relationships, ideas, or beliefs.