Candy = Champion. I think people started calling it "Candy" when there were more confusing names "CE = Champion Edition", "Proline = some Candy", then "Champion = Candy" and "Pro = well, Pro". I think the CFR stands for Champion Fund Raiser, and back before there was Star plastic, they were all Champ/Candy/whathaveyou. Now it just means stuff you can only get through tourneys.
As an aside, that stamp is one of my buddy's, good ol' ZAM in Austin.