How to Make It
Stir together first 8 ingredients in a bowl until well blended.
Preheat a grill to medium-high (400°F to 450°F). Cut 12 (12-inch) squares of heavy-duty aluminum foil. Place 6 of the foil squares in a single layer on work surface, and set aside remaining 6 squares. Place 10 clams on each of the 6 foil squares on work surface. Top each clam mound with 2 lemon wedges, 1 thyme sprig, and 1/4 cup of the butter mixture. Carefully pour 2 tablespoons wine over each mound. Top each with 1 of the remaining 6 foil squares; tightly crimp all sides.
Place sealed foil packets on unoiled grates. Grill, covered, until clams open, about 10 minutes, rotating halfway through grilling time. Discard any clams that do not open.