I wouldn't be too concerned either. It wouldn't hurt to broadcast some clover seed into thin spots, but it's probably not needed either since you have a lot of clover flowers there that will be producing seed. I agree with S.T. about clover though - it's really not preferred in my area either, especially during the hunting season. They may occasionally browse it on their way to the soybeans, but that's about it. The only places I plant clover now are areas between my fruit trees that will never get sprayed. I just mow the clover/weeds there twice a year and call it good.