Whisk together the chicken broth, agave, clementine juice, chipotle powder, cumin, lime zest and juice and 1/4 teaspoon salt in a medium bowl. Add the shrimp and toss to coat. Marinate for 10 to 15 minutes at room temperature.
Preheat an indoor grill plate over high heat.
Set a strainer over a bowl and drain the shrimp completely, reserving the marinade for later. Place the shrimp in a single layer on a paper towel-lined plate and pat dry. Sprinkle with salt. Grease the grill plate with oil.
Grill the shrimp on both sides until super charred and no longer pink in the middle, 2 to 3 minutes per side. Remove to a bowl.
Heat a large nonstick skillet over medium-high heat; add the reserved marinade and simmer until reduced by about half, about 2 minutes. Add the cooked shrimp and stir to coat in the sauce. Season with salt. If serving with brown rice, season with a couple drops of rice wine vinegar, plate and serve.