The term 'MAJOR PART' can be broken down into two crossword solutions: LEAD (4 letters) and BULK (4 letters). LEAD is a noun that refers to a person or group of people who are in charge of a particular activity or organization. It can also refer to the most important or influential person in a group. BULK is a noun that refers to a large amount of something, usually a material or substance. It is often used to describe the size or mass of an object. Together, these two words can be used to describe a large portion of something that is led by a person or group of people.