No one seems to know quite what to make of Clarence “Gatemouth” Brown. What do you do with a swing-inflected bluesman who just as often veers into country, bluegrass, and zydeco, accompanied by the bluesiest fiddle in the business? You can sit back and enjoy, that’s what. Certainly this Slidell native (originally from Vinton, raised in Orange, Texas) confounds even his fans; for example, the W.C. Handy Awards, blues music’s most prominent honor, has given up, ho...