I did that for some years as well. I found it to be a losing battle. As the clover fixes N into the soil, it makes it more and more attractive to grasses. At best, I was getting a year or two extra life for a lot of time and cost. I eventually changed my approach. I start with a very clean field with a good burn down and a winter rye nurse crop. I mow the WR the first spring each time it get much more than a foot or 18" to release the clover slowly. That first year has nothing but clover in the field. After that, I let it go. Each year, I'll mow just before the season as the cool evenings favor the clover. It is amazing how it rebounds and takes over the field. There is always plenty of clover under the grasses and weeds in the summer for deer. Most of the warm season grasses are done by fall. They also help keep cool season grasses at bay by taking up resources.
However, each year, there are more and more cool season grasses that invade the plot in the fall. When I was planting ladino, it would take about 5-7 years and with the durana I use now, 8-10 years for the cool season grasses to dominate. At that point, it is time to rotate to an N-seeking crop to use up some of the banked N and start over.
If I don't have time to replant, I can always spray the field with 1 qt/ac gly in the fall with rain in the forecast. That will top kill my clover but totally kill the grasses. If I do that, I'll usually drill radish or something into the clover. That gets me an extra year or two but eventually you need to rotate.
Thanks,
Jack