Is it all completely dead? I'm on the fence with that one and be nice to see it to make the choice and you do have choices.... You could frost seed it, very heavy. I would like to know how much grass is there and residue/trash on top. If you mow it and there's a lot of trash, could be a problem for smothering new seeds. In that case, I pry wouldn't mow, I'd just frost seed heavy if you went this route. You could light it on fire if you know how to do that without having issues if there's lots of trash. So, I guess... I might try frost seeding now, fairly thick. If not too thick of junk, even mowing now the little bit that's there to get a little better starting point for seeds to grow later. Red, white & possibly some alsike and remember, stuff like crimson & berseem can't be frost seeded. 2nd choice, if you have equipment... I'd probably prefer this route but not to say the 1st wouldn't work or you could see how 1st goes before 2nd choice.... I'd disc it up earlier in the spring (clover is a cool season legume and often the 1st thing to start growing), pack it and seed very heavy with reds, whites, berseem/crimson & you could do some oats if you wanted to mix, pack again (or light harrow, etc). Again, I'd still plant very heavy because dominated over the weeds in spring plantings is more important and you can get away with this with clover, unlike N eaters like turnips, corn, etc. Just costs more $ but go heavy and it's not that bad.