Children? That’s the problem (5)

I believe the answer is:

issue

I believe this is a double definition.

'children?' is the first definition.
(issue can mean someone's offspring)

'the problem' is the second definition.
(issue can mean a problem or difficulty)

'that's' acts as a link.

(Other definitions for issue that I've seen before include "Debate topic; flow out" , "Important topic for offspring" , "Supply" , "Children; important topic" , "Children; put out" .)

I've seen this clue in The Times.

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