The crossword solution for the term 'BE SMART WITH' is SASS. SASS stands for Syntactically Awesome Style Sheets and is a scripting language used to create style sheets for webpages. It is a preprocessor scripting language that is compiled into Cascading Style Sheets (CSS). SASS is an extension of CSS that adds power and elegance to the basic language. It allows developers to use variables, nested rules, mixins, inline imports, and more, all with a fully CSS-compatible syntax.