No clomid is used normally, although it won't hurt by taking it.
In terms of testing, the old vinigar/honey drink trick.LOL
Also there is designer steroids out there that can't be detected.
Or they will taper the winstrol and take gh and hope it holds them through.
Usually though, there is no testing in most meets even international ones. When there is, that is when you see alot of guys not run fast or fake injury. Or they use designer stuff and win the race . LOL