This cheev will come naturally for those wondering just what it entails, I will explain
Whilst going for the "Bellator Mastery" cheev (Achieve Maximum Level with Custom Fighter) when you hit level 10 (and 20 as well) you will earn a boost for your fighter. Alternatively you can buy it for 80msp.
You will then need to go to your CAF "Fighter lab" in order to select the boost and add it to your CAF and the cheev will pop as soon as you add it