Four years ago, Clever Real Estate launched with an ambitious goal: to shake up the way Americans hire real estate agents — and how much they pay them. It’s making headway. To date, the St. Louis startup boasts that it’s saved customers $80 million in fees. It’s on pace to help people sell 6,000 homes in 2021 alone. Last month, Clever announced $8 million in Series B funding, with plans to expand from 75 to 200 employees in 2022. Its total funding now sits at $13.5 million…