An animal unlikely to be overlooked (7)

I believe the answer is:

giraffe

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'an animal' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

(Other definitions for giraffe that I've seen before include "The animal might fear fig" , "Long - necked animal" , "wild beast" , "A long-legged creature" , "Animal once known as a camelopard" .)

I've seen this clue in The Globe and Mail.

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