one's own faction; one's own camp
Refers to the faction or group within a larger organization (especially a political party) that one belongs to or supports.
彼は自派の議員を集めて会合を開いた。
He gathered the lawmakers of his own faction and held a meeting.
自派 refers to one's own faction or group, the direct opposite of 他派, which means a different faction.
Compound of 自 (self, one's own) and 派 (faction, group).