Nick some breakfast after emptying cereal (5)

I believe the answer is:

clegg

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

'nick some' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'breakfast after emptying cereal' is the wordplay.
'breakfast' becomes 'egg' (I can't explain this - if you can you should give a lot more credence to this answer).
'after' means one lot of letters go next to another.
'emptying' suggests removing the centre.
'cereal' with its middle taken out is 'cl'.
'egg' after 'cl' is 'CLEGG'.

Can you help me to learn more?

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.