This sounds interesting. You need to strike a balance between the hops and the mesquite character, but you want a citrusy flavor. I'd think maybe some amarillo hops as they have a really nice orange citrus flavor. I also think keeping this beer on the lighter side of the color spectrum would be the way to go.
As for clearing the beer, you could always use some irish moss or add some plain gelatin to clear it.
Personally I think this combination would also be good in a wheat beer.
Good luck, I probably didn't help much, but I can taste your beer in my mind and it's good.
Make Beer, Not War.