Over the top, well above TPA then turn around and enter the downwind on the 45 far enough out so as not to interfere with the pattern traffic or other arrivals.
That's the textbook answer and the one you had better use on a checkride. It is not regulatory, so you can do something else if you judge it to be safe under the existing conditions. But if you create a conflict and the FAA finds out they will bust you for 91.13.