Cleric converted group of friends (6)
I believe the answer is:
circle
'group of friends' is the definition.
(I've seen this before)
'cleric converted' is the wordplay.
'converted' is an anagram indicator.
'cleric' is an anagram of 'CIRCLE'.
(Other definitions for circle that I've seen before include "Geometric shape" , "London Underground line represented in yellow" , "Draw line around (something)" , "Closed plane curve" , "Go round -- social group" .)