The term 'body of advisers' can be summarized as a CABINET. A CABINET is a group of high-ranking government officials who are appointed by the president or prime minister to advise them on matters of policy and governance. The CABINET is usually composed of the heads of the executive departments, such as the Secretary of State, the Secretary of Defense, and the Attorney General. The CABINET is responsible for providing advice and guidance to the president or prime minister on a wide range of issues, from foreign policy to domestic affairs.