In this video, @EricDavidSmith will demonstrate some techniques that he uses to clean up a mix and allow room for other instruments. More specifically, we will be using a technique called "Subtractive EQ'ing" which basically removes the unused frequencies of instruments. This creates an overall better balance and will make your mixing process much easy to work with.
It is important you do not JUST remove frequencies because people tell you to do this. Only cut what needs to be cut and boost what needs to be boosted. You obviously need to trust your ears and your listening environment first and foremost.
Follow along with this helpful interactive instrument frequency chart below and be sure to use this technique in your next mix https://alexiy.nl/eq_chart