Thumbelina creator (8)
I believe the answer is:
andersen
'thumbelina creator' is the definition.
(I know that Thumbelina author Andersen)
This is the entire clue.
(Other definitions for andersen that I've seen before include "Hans Christian . . . . . . . . was a writer of children's stories" , "Hans Christian --, Danish author" , "Hans Christian ........, Danish story-teller" , "Hans Christian ..., writer of fairy tales" , "Hans Christian . . . . . . . . wrote stories for children" .)