Piano Caroline plays in China (9)
I believe the answer is:
porcelain
'china' is the definition.
(I've seen this before)
'piano caroline plays' is the wordplay.
'piano' becomes 'p' (musical abbreviation).
'plays' is an anagram indicator.
'caroline' is an anagram of 'orcelain'.
'p'+'orcelain'='PORCELAIN'
'in' acts as a link.
(Other definitions for porcelain that I've seen before include "Crockery" , "Jasper, perhaps" , "Form of ceramic" , "Fine white ceramic" , "Fine earthenware" .)