Incredible account from giraffe? (4,5)

I believe the answer is:

tall story

I'm a little stuck... Click here to teach me more about this clue!

'incredible account' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for tall story that I've seen before include "Remarkable tale" , "romance?" , "Exaggerated tale" , "Fiction" , "Fairy tale" .)

I've seen this clue in The Sun.

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