coterie

1. N-COUNT-COLL A coterie of a particular kind is a small group of people who are close friends or have a common interest, and who do not want other people to join them. 小圈子[正式] [usu with supp]

The songs he recorded were written by a small coterie of dedicated writers. 他錄的歌曲是由一個忠實的作家小群躰所撰寫的。