I dint know of anyone who takes Clomid on cycle. Clomid is used instead of Test as a montherapy for TRT. But I've never come across anyone using a Clomid while doing a Test cycle.
Check this out. Look at the half lives of all the different steroids and compare them to Clomid.
I take Clomid and HCG with my Test on my TRT program. Works great. There's a lot of debate about whether to take HCG on cycle or PST - I think on and off cycle is appropriate since on cycle it magnifies the heightening of Test levels and off cycle it prevents Test levels from crashing. Clomid on the other hand is a fertility drug that kick starts spermatogenesis by raising FSH levels to offset a lack of natural production. Back to the original point - Jones was probably Clomid and the AI to prevent his Test levels from dropping close to the fight, which could've been disastrous in terms of his performance. He took a chance and got caught.