The term 'Indication of Rank' can be summarized as a sign or symbol that denotes a person's rank or status. The crossword solution for this term is 'STRIPE, ' which is a common visual indicator of rank in many organizations, such as the military. Stripes are often used to denote different levels of authority, with more stripes indicating higher rank. Stripes are also used to indicate length of service, with each STRIPE representing a certain number of years.