Extraordinary cleric from Ring (6)
I believe the answer is:
circle
'ring' is the definition.
(I know that ring can be written as circle)
'extraordinary cleric' is the wordplay.
'extraordinary' is an anagram indicator.
'cleric' with letters rearranged gives 'CIRCLE'.
'from' acts as a link.
(Other definitions for circle that I've seen before include "Round shape" , "Upper theatre seating" , "Geometric shape" , "Orbit" , "Cycle - enclosure" .)