The term ASST. is an abbreviation for Assistant. It is a job title that is typically used in a variety of settings, such as business, education, and government. The two crossword solutions for this term are ADMIN (5 letters) and DEP (3 letters). ADMIN stands for Administrator, which is a person who is responsible for the day-to-day operations of an organization or department. DEP stands for Deputy, which is a person who assists a higher-ranking official in their duties.