How do I go about preserving a large stand of established clover in a greenfield and seeding with wheat and oats for fall planting?

I have multiple fields where clover my deer love to hammer is well established, and I want to be able to not have to kill it or reseed for it while also adding my usual oats and wheat to the greenfield mix. Any advice would be greatly appreciated.

Kill any weeds or grass out then just spread seed before good rain chances.

The above is all you can do unless you know someone with a no-till drill or where to rent one. I drill my grass seed into my established clover fields. I topped sowed for years with good results, however the timing of rain is more critical versus using a drill.

most clovers will grow back from root stock so a "light disking" dragging after throwing see would work. Best just before a rain obviously

This.

This will work too. Clover is hard to get rid of once it's established.