The term 'Carnival Setup' can be broken down into two crossword solutions: TENT (4 letters) and STEREO (6 letters). A TENT is a temporary structure made of fabric or other material supported by poles and typically used for shelter or as a decorative feature. It is often used in outdoor events such as carnivals, festivals, and fairs. A STEREO is an electronic device that reproduces sound from multiple sources. It is commonly used to play music at events such as carnivals, festivals, and fairs. Together, a TENT and a STEREO are essential components of a carnival setup.