My husband has tourettes. Yes clearing of the throat could be the beginning.Have her learn to control her emotions now. Learn to stop things before they happen. Use the name of Jesus to help stop behaviors. My husband is also allergic to milk products and has clearing of the throat so he takes milk digestatives which help. That could help with throat clearing. She has to learn at a early age what good and bad behaviors are. I will also pray for you for God to give you direction and him to heal the girls of tourettes.