Monument in marble male trio sculpted (6,8)
I believe the answer is:
albert memorial
'monument' is the definition.
(I've seen this before)
'marble male trio sculpted' is the wordplay.
'sculpted' indicates an anagram.
'marble'+'male'+'trio'='marblemaletrio'
'marblemaletrio' anagrammed gives 'ALBERT MEMORIAL'.
'in' acts as a link.
(Other definitions for albert memorial that I've seen before include "Monument" , "Landmark in Kensington Gardens" .)