clicking noise when trying to start car, battery is good?

Hello, if you're absolutely certain that the battery is good, meaning it has been tested and can hold a load, then I would start looking at the battery cable connections at the battery, the starter, the engine ground, and ensure everything is secure and not corroded. Following this, I would have the starter tested to see if it is drawing too much amperage. You may want to reach out to a shop near you to assist -- here is a link to folks near you. http://repairpal.com/jaguar-within-10-miles-of-mesa-arizona-85210