The term INTRODUCTORY TEXT can be defined by two crossword solutions: PREAMBLE (8 letters) and PRIMER (6 letters). A PREAMBLE is an introductory statement in a document that explains the document's purpose. It is usually found at the beginning of a constitution, statute, or other legal document. A PRIMER is a short book or other text that provides basic information on a subject. Primers are often used to introduce people to a new topic or to provide a basic understanding of a more complex subject.