Put the gammon and water into the rice cooker inner bowl and set the SLOW COOK function of your rice cooker.
Press START and cook for 6-8 hours or until the gammon is cooked.
When cooked lift out and leave to cool for 10 minutes. Remove any rind and score any remaining ham fat in a criss cross pattern.
Add the brown sugar, honey, mustard, water, garlic and cloves to the liquid left in the inner bowl.
Set the SLOW COOK function for 2-3 hours, press START and cook for 10 minutes.
Place the ham back into the inner bowl with the glaze and baste it. Close the lid and cook - basting 3 or 4 times during the remaining cooking period
Slice then serve and pour some of the glaze liquid over the top of the ham. Thicken the glaze with cornstarch if needed.