Crossword Genius

Intros from old radio broadcast (7)

Ross

I believe the answer is:

exordia

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'intros' is the definition.
Both the definition and answer are plural nouns.
Maybe there's a link between them I don't understand?

'old radio broadcast' is the wordplay.
'old' becomes 'ex' (prefix meaning former or onetime).
'broadcast' indicates anagramming the letters (letters scattered or cast around).
'radio' anagrammed gives 'ordia'.
'ex'+'ordia'='EXORDIA'

'from' is the link.

Can you help me to learn more?

(Other definitions for exordia that I've seen before include "Introductory parts" , "Introductions" , "introductory sections" , "Starts to lecture" , "Parts of speech" .)

I've seen this clue in The Times.
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