Nanny's kin (2,4)
I believe the answer is:
au pair
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">nanny's kin</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(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" .)