Dog associated with Hans Christian Andersen? (5,4)

I believe the answer is:

great dane

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'andersen?' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for great dane that I've seen before include "A best friend" , "Large breed of dog" , "Big dog" , "Could be barking" , "Dog -- a tad green (anag)" .)

I've seen this clue in The Times.

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