Nanny's kin (2,4)
I believe the answer is:
au pair
'nanny's kin' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for au pair that I've seen before include "Family assistant" , "Young foreigner living with a family in return for housework" , "French girl, say, who does" , "Live-in carer from abroad" , "Young foreigner helping with children and housework" .)