Place ham cut side down into slow cooker insert. Add brown sugar, cinnamon stick, and cloves.
Pour apple juice over the ham. Cover and cook on high for 6 hours or low for 8 hours.
When done, remove ham. Strain liquid into a small saucepan. Skim off as much fat as possible from the liquid. Boil on the stove until sauce is reduced by half.
Slice ham and brush or pour sauce over ham slices before serving.