Check out this podcast by The Lawn Care Nut himself, Allyn Hane, about how selfish nitrogen-fixing clover truly is:
That said, you want to know how to get rid of it, right? The easiest and cheapest way to do that is to get an over-the-counter weed control and get on it!
Bio-Advanced Concentrate is one that we recommend for cool-season lawns (Kentucky Bluegrass, Fescue, Ryegrass) because it’s easy to get, has some fudge factor built-in (lower active ingredients so less chance of injury to turf) and most of all, it works.
Additionally, it contains Quinclorac which can stunt and kill early-season crabgrass which many of you may also be concerned with.
Here is a blog post with more details: DIY Weed Control is Cheaper than You Think
Keywords: clover, weed, cool-season, DIY weed control, weed control, Quinclorac