We haven't seen to much of Clev or Bellew at CW, but I'd see Afolabi beating the pair of them - very underrated fighter. I'd like to see Clev being top dog of the 3 though.
I can't see either man beating Huck (WBO) or Lebedev (WBA) and those are the men with the belts that Bellew and Cleverly hold lower versions of. I would say Afolabi might end up getting the fight with the winner of Clev v Bellew but the BBBoC don't allow IBO World Title fights so I would say he is too much risk for not enough reward.
Don't expect Bellew/Cleverly to face any of the top CW's before getting a shot. I'd pick Afolabi to beat both. Bellew/Cleverly are good for the division though... They bring a lot of interest/hype to a very underrated division.