Creator of the Hundred Acre Wood (5)
I believe the answer is:
milne
'creator of the hundred acre wood' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for milne that I've seen before include "Writer of Winnie the Pooh" , "Children's author" , "AA man" , "Pooh's creator" , "Creator of Eeyore" .)