First off, clevs isnt a 'DM' however he is a creative box to box player.
It seems Fergie is moving away from relying on a Defensive midfielder and therefore does not feel the need to go out and buy this specific type of player, especially if we have players that can do the job, if need be (Carrick, Jones, Fletch and Pog if he stays)
Fergie has always been more of a fan of box to box mids, and id imagine his new desire to play a faster game, will re-enforce this.
my view is the most NB type of player we need to be bringing in right now to accomodate this fast style of play, is a creative central player....ie Kagaw***