Priests away with the fairies (7)
I believe the answer is:
sprites
'the fairies' is the definition.
('sprite' can be a synonym of 'fairy')
'priests away' is the wordplay.
'away' is an anagram indicator (letters move away from their original places).
'priests' is an anagram of 'SPRITES'.
'with' acts as a link.
(Other definitions for sprites that I've seen before include "Elves or fairies" , "Brownies" , "goblins?" .)