Crossword Genius

Pop group mostly put out over emcee's opening persuasive speech (9)

Ross

I believe the answer is:

eloquence

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'persuasive speech' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

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(Other definitions for eloquence that I've seen before include "Fluency, persuasiveness" , "Gift of the gab" , "Fluency of expression" , "Powerful and effective language" , "Fluent speaking" .)

I've seen this clue in The Independent.
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