Tilled field? No, not now. Unless your area has decent traditional Aug rain. For my area, Aug has notoriously undependable for rain and it's often hot. Conditions that dry-out the top few inches that young clover roots need to be moist.
Throw and mow? Or spray and throw? You might have success seeding clover in July. Rooted and unbroken soil retains a lot more moisture than bare, tilled soil. With untilled soil, the little bit of shade that the the dead weeds or mulch provide can mean the difference between sprouts that stay alive until fall conditions and the difference of seeds that germinate because of a decent rain or 2, only to die because the Aug rain shuts off and it gets hot. Clover hates that.
Slope should be a consideration, too. If I tilled soil now, I know that I would lose top soil with just one heavy rain. Been there done that, way too many times! A heavy Aug thunderstorm, which is common here, washes away new seed and soil. What seed remains will germinate, but then the Aug drought and heat come and those clover seedling dry out and die.
TnM clover now, Okay. Tilled plot clover now? Not on my place.