Place the ham in the slow cooker, flat side down, with the scored side facing up.

Score the top of the ham using a sharp knife to make criss-cross marks about 1/8 inch deep.

Push about 1 teaspoon of the cloves into the top of the ham.

In a medium-sized saucepan, combine honey, orange slices, orange juice, brown sugar, ground ginger, ground mustard, and the remaining teaspoon of cloves.

Cook on medium heat for 5 minutes, until the glaze has reduced in half.

Drizzle half of the glaze mixture over the ham, saving the other half to drizzle later.

Cover the slow cooker and cook on low for 4 to 5 hours.

Add more glaze every hour of cooking, and in the last hour, add more glaze every 25 minutes.

When the ham has developed a crunchy, dark brown glaze, remove it from the slow cooker and serve immediately.

Let the ham rest for 10 minutes after removing it from the slow cooker.

Slice thinly along the spiral and arrange on a warm platter.

Spoon any pan juices or leftover glaze over the top before serving.