Looks like the branch needs a bit of training, it's stretched out and is trying to lean upwards towards the light but with a stretched out base there is weakness to the branch, it needs a bit of super cropping done to it (or needed some previously).
Do you run a fan in your grow room often? Branches like these and be controlled with a little wind management also, to control the stretch and force the branches to grow straighter.
Wind is a good training tool for plants and their height and development etc, it's best to start them early I put a little 4" vent fan on mine about a day after they sprout, stand up straight and have green in their cotyledons, just be sure that only a moderate amount of movement is occurring to your young ones, a fan too close can dry them out, and don't run fan for more than a few hours like 3-6 hours at a time at first, or they will get over stressed from the constant movement.
Hope this helps.