Possible Clues:

• Six-part exams, for short
• Barack, Michelle, Hillary and Bill took them, for short
• Exams for future atty.s
• Hurdles for future JDs
• Exams offered four times a year, for short
• Exams for some srs
• Exams for some future clerks: Abbr
• Hurdles before the bar exam, briefly
• Exams for aspiring attorneys, in brief
• Exams for atty. wannabes