The crossword solution for the term LEAD-IN TO 'REQUISITE' is PRE. The term PRE is an abbreviation of the word 'PREREQUISITE', which means something that is necessary or required in order to do something else. It is often used in the context of education, where a student must complete certain courses or requirements before they can move on to more advanced studies. In other contexts, it can refer to any requirement that must be met before something else can happen.