The crossword solution for the term WALK-INS (SOME CLOSETS) is INS, which stands for 'involuntary non-scheduled.' This term is used to describe customers who enter a business without an appointment or reservation. These customers are often referred to as 'WALK-INS' because they simply WALK in without prior notice. WALK-INS can be beneficial to businesses because they provide additional revenue and can help fill gaps in the schedule.