Michelangelo masterwork (5)
I believe the answer is:
pieta
'michelangelo masterwork' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pieta that I've seen before include "Mary-with-Christ sculpture" , "Religious figures" , "Sculpture of Mary grieving over body of Jesus" , "(In painting etc) representation of the dead Christ" , "mournful image" .)