Halo wearers (6)
I believe the answer is:
angels
'halo wearers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for angels that I've seen before include "Winged heavenly messengers" , "Supernatural messengers" , "See 9" , "Divine beings" , "THIRD PART OF 12" .)