Crossword Genius

Having a baby but not coming out with the truth? (5-2)

Ross

I believe the answer is:

lying-in

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'truth?' is the definition.
The definition and answer can be both states of affairs as well as being singular nouns.
Perhaps you can see an association between them that I can't see?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for lying-in that I've seen before include "Confinement" , "Staying abed - confined in childbirth" .)

I've seen this clue in The Globe and Mail.
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