Verbal Commits has him listed as a RS Senior so GoRMU is probably right about him being a graduate transfer, probably immediately eligible.
Plus 6'7 JC transfer Malik Petteway, at least last time I looked
A talented player, sorry to see him go. Moving to a JUCO this late in the summer, could be academic issues, who knows. It is not unusual for a D-1 player, after his freshman year, to be disappointed with playing time and decide to transfer to a JUCO in order to get a fresh start, but Clive looked to be a likely starter this coming year, unless he was concerned about the competition from the newcomers that he saw this summer.