The term 'Inaugural Pledge' refers to the OATH of office taken by a president or other public official upon assuming office. The crossword solution for this term is 'OATH, ' which is a solemn promise or commitment to fulfill a certain duty or obligation. This OATH is typically made in front of witnesses and is often accompanied by a swearing-in ceremony. The OATH is a symbol of the official's commitment to uphold the laws and principles of the office they are assuming.