Elf having a moving effect on a priest (6)
I believe the answer is:
sprite
'elf' is the definition.
(I've seen this in another clue)
'a moving effect on a priest' is the wordplay.
'priest' can be anagrammed to 'SPRITE'.
Though, I am unsure how this is indicated.
'having' acts as a link.
Can you help me to learn more?
(Other definitions for sprite that I've seen before include "Goblin, elf or imp" , "sports car" , "Stripe on a fairy" , "Puck, say" , "Brownie" .)