Fairy godmother’s back after prince enters scene (6)
I believe the answer is:
sprite
'fairy' is the definition.
(synonyms)
'godmother's back after prince enters scene' is the wordplay.
'back' indicates one should take the final letters.
'after' is a charade indicator (letters next to each other).
'prince' becomes 'p' (abbreviation).
'enters' means one lot of letters goes inside another.
'scene' becomes 'site' (I've seen this in another clue).
The last letter of 'godmother' is 'r'.
'r' after 'p' is 'pr'.
'pr' inserted into 'site' is 'SPRITE'.
(Other definitions for sprite that I've seen before include "Dainty type" , "Stripe on a fairy" , "Puck, say" , "Elf, fairy" , "Goblin, elf or imp" .)