Religious portrait from two Athenian characters? (5)
I believe the answer is:
pieta
'religious portrait' is the definition.
(artwork depicting Mary with Jesus' body)
I don't understand how the rest of the clue works.
(Other definitions for pieta that I've seen before include "Post-Crucifixion scene sculpture" , "Mary-with-Christ sculpture" , "Religious figures" , "Statue of Mary and Jesus after the Crucifixion" , "(In painting etc) representation of the dead Christ" .)