Crossword Genius

Without children stuffy, we hear (8)

Ross

I believe the answer is:

heirless

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'without children' is the definition.
(lacking heirs or successors)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for heirless that I've seen is " Lacking a successor".)

I've seen this clue in The Times.
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