If you think that insubordination is old news, then it's time for you to get some new information about management. Your employee's actions are one hundred percent unacceptable, and she needs to hear that message from you.
The next time she plays her condescending or arrogant cards during a meeting, one approach is to tell her immediately that her comments and tone are interfering with the meeting and must stop. The problem is that public humiliation is not exactly an enlightened form of management.
A better approach is to wait until the meeting ends and then tell her that you need to meet with her immediately. You should then clearly describe the inappropriate behaviors in the most recent meeting, as well as in others. Be sure to provide her with dates and sample comments, and let her know that such behavior is upsetting, unprofessional, and unacceptable.
The final step is to let her know the consequences associated with this behavior. Since the issue is insubordination, the outcome can be termination. There may be a place for arrogant and condescending behaviors, but not in your place of work.
| 
