Fictional character prone to losing his tail (6)

I believe the answer is:

eeyore

(Other definitions for eeyore that I've seen before include "Donkey, 19's friend" , "A. A. Milne donkey" , "Miserable donkey" , "Fictional donkey" , "Christopher Robin's dismal donkey" .)

I've seen this clue in The Wall Street Journal.

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