American mother keeping various curios in playing area (5,4)

'playing area' is the definition.
I know nothing about this answer so I can't judge whether this works.

'american mother keeping various curios' is the wordplay.
'american mother' becomes 'mom' (mom is a kind of mother. I am not sure about the 'american' bit.).
'keeping' is an insertion indicator (some letters kept inside).
'various' is an anagram indicator.
'curios' anagrammed gives 'usicro'.
'mom' placed around 'usicro' is 'MUSIC-ROOM'.

'in' is the link.

Can you help me to learn more?