Minister in Magic Circle? (6)
I believe the answer is:
cleric
'minister' is the definition.
(thesaurus)
'magic circle?' is the wordplay.
'magic' indicates anagramming the letters.
'circle' anagrammed gives 'CLERIC'.
'in' acts as a link.
(Other definitions for cleric that I've seen before include "Religious man" , "Religious official" , "Priest caught in circle" , "Man of the cloth" , "Person ordained to the Christian ministry" .)