Michelangelo masterpiece (5)
I believe the answer is:
pieta
'michelangelo masterpiece' 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 "Devotional painting" , "Statue of Mary and Jesus after the Crucifixion" , "Sculpture of Mary with Christ's body" , "Religious depiction" , "Sculpture or painting of Mary praying over body of Jesus" .)