I understand that rabbits love to eat clover....Perhaps by fencing in a couple of bunnies (male and female)in your lawn area, they and their growing family will eliminate your clover problem..:bwahaha:
Seriously, there are some brands of weed killers that can specifically target clover. If that does not work, you might look at spot treating the clover with RoundUp. That will kill it but it will also kill everything including any grass that it touches...so don't apply RoundUp on a windy day. After about 2 weeks, you can replant grass where the clover was killed.
As a last resort, you might have to go with l1Tech's plan to just dig up the old lawn and replant or better yet, lay down sod. Remember, a good thick lawn is the first defense against weeds by depriving the weed seeds the light and water needed to germinate. It's also a good idea to put down a pre-emergent weed & feed early in the spring which helps prevent weed seeds from germinating.
...Rich