Broadcast spectrum at English breakfast? (8)

I believe the answer is:

crumpets

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

'at english breakfast?' is the definition.
I can't judge whether this definition defines the answer.

'broadcast spectrum' is the wordplay.
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'spectrum' with letters rearranged gives 'CRUMPETS'.

Can you help me to learn more?

(Other definitions for crumpets that I've seen before include "Soft toasted and buttered cakes" , "Spectrum (anag)" , "Teatime fare" .)

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

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