The term 'PART OF A SUPPORT GROUP' can be broken down into three crossword solutions: FAN (3 letters), BRA (3 letters), and PILLAR (6 letters). A FAN is an enthusiastic admirer of a person, team, or activity. Fans often show their support through attending events, wearing merchandise, and cheering on their favorite teams. A bra, short for brassiere, is an item of clothing worn by women to support their breasts. Bras come in a variety of styles and sizes and are designed to provide comfort and support. Finally, a PILLAR is a large, upright structure that provides support for a building or other structure. Pillars are often made of stone, metal, or wood and are used to hold up roofs, bridges, and other structures.