The term 'Cabinet Part' can refer to three different solutions in a crossword puzzle: DEFENSE (7 letters), SECRETARY (9 letters), and DOOR (4 letters). DEFENSE is a term used to describe the protection of a nation or its citizens from external threats. The SECRETARY is a high-ranking government official who is responsible for managing the day-to-day operations of a department or agency. Finally, a DOOR is a movable structure used to open and close an entranceway. All three of these terms are related to the Cabinet, which is a body of high-ranking government officials who advise the President on policy matters.