Add orange juice, pineapple juice and cream of coconut to large stock pot.
Stir in orange zest, orange slices and sugar.
Bring a boil then turn heat down to simmer.
Simmer for 15 minutes or until sugar is completely dissolved.
Remove from heat and allow to cool completely.
Stir Everclear and pineapple syrup into the cooled mixture.
Ladle into jar and seal tightly.
Store in a cool, dark place for at least 8 weeks before enjoying. See notes.