Two things...I'm assuming your not on any hormonal PED's atm, as if you were the clomid would be pretty much a waste and if your just feeling "run down" from typical over training (i.e constantly over sore, getting weaker, exhausted during the day, CNS burn out, immune system low, etc) then I suggest you take a week off from lifting and any high intensity cardio vascular activity. Do some mobility work so you keep blood flowing, maybe even some LISS cardio, keep protein consistent, and catch up on sleep and increase electrolytes along w/hydration.
Now if your not on any PED's and you are know for a fact that your Test levels are low, like -300, then a combination of Clomid (@ 40~100mg), nolva (@ 10~20mg), hcg (@ 500-1g), aromasin (@ 6.25~12mg) or even armistane (@75~100mg) for 4-6 weeks will definitely JACK UP your test levels to healthy physiological levels. Will this have a direct correlation to reducing over training? Not really...but possibly an indirect correlation that can definitely help with many physiological process' in the body over the long haul. Many HRT doctors prescribe similar protocols for men suffering from low T before they ever put them on hormones. Also if you decide to go this route I really believe 25mg/day of clomid wont do the trick. I and most HRT Dr recommend 40-100mg/day.