Aren't those two absolutely different things? I never used Clubhouse but i imagined it is more like facebook or instagram and not just a messenger. Of course i might be wrong. The answer to your questions anyway is - yes. You can create any app you want if you have the right knowledge or you have right people working for you. Hope you clearly understand that creating an app is the easiest thing when it comes to starting a new business. The difficult part here - how to turn an idea into a business and that's the part you have to pay your attention at.