Urges to have breakfast? (4)

I believe the answer is:

eggs

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'urges' is the definition.
(to egg someone on is to urge them to do something)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for eggs that I've seen before include "Contents of nests" , "Ovoid objects" , "Don't put all these in one basket" , "Chickens lay them" , "Wherein soldiers enter" .)

I've seen this clue in the Evening Standard.

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