The crossword solution for the term 'RAW STUFF' is 'ORE', which is a three-letter word. ORE is a naturally occurring solid material from which a metal or valuable mineral can be extracted. It is usually found in rocks and minerals, and is mined for the extraction of valuable metals such as gold, silver, and copper. ORE is also used to create alloys, such as steel, and is an important component of many industrial processes.