Mow over the clover-infected grass with your lawnmower. The ideal height of the grass is 2 to 3 inches.
Pour the herbicide and water into a pressurized sprayer, filling with appropriate amounts as described on the herbicide container. Pressurize the sprayer by pumping the handle. Use a herbicide that has Dicamba or MCPP, as these are best for clover, according to the website Blades Lawn Care.
Spray the area infected with clover on a day when rain is not forecast. You may need to make several dosages over several days to completely eradicate the clover.
Plant grass seed over the area where the clover died. This will fill in dead patches and prevent clover from repopulating the area.