Young home help, OO I say? (2,4)

I believe the answer is:

au pair

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'young home help' is the definition.
'au pair' can be an answer for 'help' (type of home help). I am not sure about the 'young home' bit.

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

Can you help me to learn more?

(Other definitions for au pair that I've seen before include "Family helper" , "Working lodger" , "Young foreigner doing light domestic duties in return for keep" , "child-minder" , "One helping with childcare" .)

I've seen this clue in The Guardian.

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