As far as mixing in clover in with winter wheat or big and beasty(an guessing this is like a turnip type mix) the answer will be based on this
those to seed mixeswinter wheat/turnips, DON"T get mowed, where as clover does better with a few mowings, mowing clover keeps it tender, and desirable to deer and like critters, due to the more tender it is, the better(they claim) tasting it is and the easier it is for deer to digest it, thus why they prefer it cut
mowing clover will also help in a HUGE way to keep weeds at bay, or will for sure help keep clover the main crop
Clover always looks GREAT in early spring to mid summer, then as weed seeds blow all over hell from??? And thus landing in clover plots, manymany times without mowing or spraying a clover plot can be taken over, as fast or slow, pending on clover plots take/stand, and any mowing or spraying of course
but weeds grow fater than clover, thus why there a pain in the ass to deal with
adding clover to a wheat/turnip plot, removes the ability to mow and maybe even spray that said plot?
so adding clover can be done, BUT at same time, you will have less tools to use to maintain that plot
PLUS, wheat and turnips are seasonal plantings, so every yr they need to be replaced
and clover is an annual, so your more or less wasting clover(to a point) clover will add free nitrogen to the soil, which is never a bad thing, but clover seed isn't cheap either really so??
that's your budget's call on seeding over wheat/turnips