Caribbean cult (6)
I believe the answer is:
voodoo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">caribbean cult</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for voodoo that I've seen before include "System of witchcraft" , "Haitian magic" , "Caribbean magic cult" , "Form of magic" , "Haitian witchcraft" .)