Crossword Genius

Lectures by one in exchanges (7)

Ross

I believe the answer is:

tirades

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

'lectures' is the definition.
The answer and definition can be both related to communication as well as being plural nouns.
Maybe they are linked in a way I don't understand?

'one in exchanges' is the wordplay.
'one' becomes 'i' (roman numeral).
'in' indicates putting letters inside.
'exchanges' becomes 'trades' (trade is a kind of exchange).
'i' going within 'trades' is 'TIRADES'.

'by' is the link.

Can you help me to learn more?

(Other definitions for tirades that I've seen before include "stormy blasts" , "Astride (anag) - diatribes" , "Denunciations" , "Speeches of violent denunciation" , "Long angry speeches of criticism or accusation" .)

I've seen this clue in The Hindu.
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