The crossword solution for the term 'Firm Cheese' is BOSS, which is a four-letter word. BOSS is an acronym for 'Benevolent Organizational Structure System' and is used to describe a hierarchical structure in which a leader or manager has authority over subordinates. It is also used to refer to someone who is in charge of a business or organization. In the context of firm cheese, it could refer to the person in charge of the production of the cheese.