'Like some marrow?', I say -- look at that interrupting breakfast celebration (7)

'that interrupting breakfast celebration' is the definition.
I can't judge whether this defines the answer.

'like some marrow? i say look' is the wordplay.
I cannot quite understand how this works, but
'like' could be 'y' ('y' can be similar in meaning to 'like') and 'y' is found in the answer.
'i' could be 'me' and 'me' is found in the remaining letters.
'look' could be 'lo' and 'lo' is present in the answer.
The remaining letters 'id' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).

'at' is the link.

Can you help me to learn more?