Crossword Genius

Son picks up response about eastern criers (7)

Ross

I believe the answer is:

yelpers

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

'picks up response about eastern criers' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'son' is the wordplay.
I cannot quite see how this works, but
'son' could be 's' and 's' is found within the answer.
The remaining letters 'yelper' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Hindu.
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