Crossword Genius

Tests the microphone when one cajoles? (5,4)

Ross

I believe the answer is:

talks into

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'tests' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Another definition for talks into that I've seen is " Persuades".)

I've seen this clue in the Evening Standard.
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