I use rr corn and beans together all the time. The best mix of nutrition and attraction I've ever used. White clover can take a light dose of gly and shake it off if you know what you are doing, but technically is not rr. If you keep beans and corn standing all year with a few clover plots, you are covered (at least for 99.9% of people).
And about the clover and rr, I really prefer to use the right chemical for the job. Grass is easily cleaned up for under $10/acre and broadleaf weeds are normally controlled by mowing a couple times a year.