Prefix with scope (4)
I believe the answer is:
peri
'prefix with scope' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for peri that I've seen before include "Beautiful fairy" , "Type of disembodied spirit or graceful young girl" , "Fairy of Persian folklore" , "Fairy of Persian myth" , "Ripe as a kind of fairy" .)