する癖がある

have a habit of doing; tend to do

→ 為る
phrase Rare #37,232
have a habit of doing; tend to do Describes a habitual behavior or tendency, often one that is noticeable or slightly undesirable. The verb before 癖がある indicates the behavior, and する癖がある is used when the behavior is expressed with する.
JA: 彼女は自信のないときに咳払いをする癖がある。
EN: She has a habit of clearing her throat when she feels unsure of herself.

彼はドアを開け放しにする癖がある

He has a habit of leaving the door wide open.

彼女は自信のないときに咳払いする癖がある

She has a habit of clearing her throat when she feels unsure of herself.

彼女は話す前に咳払いする癖がある

She has a habit of clearing her throat before speaking.