For glaze, combine apricot preserves, orange juice, soy sauce, and lemon juice.
Score ham by making shallow cuts diagonally across the surface in a diamond pattern.
Stud with cloves.
Insert a meat thermometer near center of ham.
Place ham in center of the cooking grill.
Grill 1 to 2 1/2 hours or till meat thermometer registers 140Â°F (60Â°C), brushing with glaze during the last 15 minutes of grilling time.
Let stand 15 minutes.
Heat remaining glaze on the side of the grill to pass with ham.
Just before serving, brush ham with glaze again.