Anglican headwear (5)
I believe the answer is:
mitre
'anglican headwear' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mitre that I've seen before include "Merit (anag.)" , "Timer for a bishop." , "Corner joint - bishop's hat" , "Item of headgear" , "Kind of joint" .)