To go over a new perrenial clover plot and spot treat with regular roundup?

I had the plot put in this Feb, plow, disk then plant, but no herbicide treatment beforhand. I went over it a month ago with grass killer as the clover was starting to sprout, but haven't seen it since. I used "high volume grass killer" supposed to be a generic for poast. At the time there were plenty of other weeds as well. There's been lots of rain, so if the grass killer worked, it should just be a matter of dealing with the other weeds.