Articles (http://www.ncbi.nlm.nih.gov/pubmed/4615915) and tons of posts in many forums (http://anabolicminds.com/forum/male-anti-aging/77768-low-testosterone-clomid.html) claim that clomid can fix hypogonadism. Take it for long enough and, when you come off, your T will be at stable high levels.
Why does that happen? If your T is low, it’s because your body wants it to be low due to the HTPA negative feedback. When you take clomid, you force your pituitary to ask your testes for more T. But when you come off, shouldn’t the pituitary realize that you have a lot of T, and therefore shut you down?