Roald who wrote "Fantastic Mr. Fox" (4)

I believe the answer is:

dahl

(Other definitions for dahl that I've seen before include "Roald or Sophie?" , "Roald - - (deviser of Willy-Wonka)" , "Roald -, British writer" , "James and the Giant Peach author" , "British writer of many children's books, d. 1990" .)

I've seen this clue in The New York Times.

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