American carved a large breast in white stone (9)
I believe the answer is:
alabaster
'white stone' is the definition.
(I've seen this before)
'american carved a large breast' is the wordplay.
'american' becomes 'a' (common abbreviation - e.g. in organisation names).
'carved' indicates an anagram.
'large' becomes 'L' (eg in clothes sizes).
'a'+'l'+'breast'='albreast'
'albreast' with letters rearranged gives 'labaster'.
'a'+'labaster'='ALABASTER'
'in' is the link.
(Other definitions for alabaster that I've seen before include "White stone carved into ornaments" , "Arabs tale (anag.)" , "Stone often used for carving" , "statuary material?" , "Blast area for white mineral" .)