Crossword Genius

Revered idea broadcast around area of country from the beginning (6,3)

Ross

I believe the answer is:

sacred cow

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'area of country from the beginning' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'revered idea broadcast' is the wordplay.
'revered' becomes 'sacred' (similar in meaning).
'idea broadcast' becomes 'cow' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'sacred'+'cow'='SACRED COW'

'around' acts as a link.

Can you help me to learn more?

(Other definitions for sacred cow that I've seen before include "One unreasonably held to be above criticism" , "lower in religion" , "one not to be criticised" , "Thing regarded as beyond criticism" , "A hallowed institution like Indian bovine" .)

I've seen this clue in The Independent.
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