The crossword solution for the term 'Form of a Verb' is 'TENSE'. TENSE is a grammatical category that locates a situation in time, indicating when an event or state of being occurs or occurred. It is used to refer to the time of an action or state of being as expressed in a verb. There are three main tenses: present, past, and future. Each of these tenses can be further divided into four aspects: simple, perfect, progressive, and perfect progressive.