This is a solid fight for Stevenson at 130 and should help him get adjusted to the new weight division. Clary is a good fighter who is a step below the world champions and contenders at world level.
I think Stevenson will win a decision by out boxing Clary over ten rounds due to his superior technical skills. Clary will be competitive to an extent but I don’t think he has the skill set to upset a fighter of Stevenson’s caliber especially as Stevenson is expected to be a big star of American boxing in the future.