Doctoral Degree. To practice as a clinical psychologist, you must have a doctorate in psychology -- either a Doctor of Philosophy, or Ph.D, or a Doctor of Psychology, or Psy.D.The difference between the two degrees can be confusing, but it essentially comes down to your career goals.he first step toward becoming a clinical psychologist is to obtain a bachelor's degree. According to the U.S. Bureau of Labor Statistics, it's not always necessary to have a bachelor's degree in psychology for entry into graduate programs.