Go with ad for breakfast fare? (3)

I believe the answer is:

egg

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'breakfast fare?' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for egg that I've seen before include "One beaten by a whisker perhaps" , "Baby carrier?" , "Hen fruit" , "Item with a yolk" , "Oval item" .)

I've seen this clue in the Sydney Morning Herald.

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