There are a ton of tools available for chopping up ground beef, ground pork, ground turkey and ground chicken while cooking that eliminate the clumps so you don't have to do it with your hands afterward. People love these!
If you don't cook ground beef that often, you may not need a dedicated tool for this step of a recipe and can simply use a potato masher.  We recommend the wire potato mashers because they are better at getting the clumps out and can also be used to make guacamole and mashed potatoes so are more versatile than some of the other options.