I am sorry to hear you are worried about Jezibel. My name is Rebecca. I am a veterinarian and will do my best to help.
The first thing I would want to do is look into the ear with an otoscope to look for a weed seed or a tick inside the ear, and to sure the ear drum is intact. You can only see about 1/3 of the ear canal when you look inside without a scope, and you cannot see the ear drum. Sometimes dogs shake their heads like this trying to dislodge something caught in the ear like a foxtail (grass awn, grass seed) or tick.
The clear discharge could be infection. The yeast infections usually cause a reddish brown or dark discharge.
Do you have an ear cleaning solution you have used in the past? You could try gently cleaning the ear with that, or with a water/vinegar solution: pour it in gently, massage the ear gently, and then let her shake it all out. After she shakes, dry off the ear.
Anti histamines might help if this is from an allergic reaction to pollen or mold or dust. We don't know why but we can see just one ear affected by allergies. You can give Benedryl, 25 mg per 25 pounds of body weight, twice to 3 times daily, or Claritin 5 to 10 mg once daily.
Let me know what other questions I can answer.