The crossword solution for the term 'Mushroom Component' is STEM, which stands for the STEM of a mushroom. The STEM is the part of the mushroom that connects the cap to the ground and supports the mushroom's structure. It is typically white or brown in color and can range in size from a few millimeters to several centimeters. The STEM also contains the mushroom's spores, which are released into the air when the mushroom matures.