Religious image from Mondrian, possibly almost his last (5)
I believe the answer is:
pieta
'religious image' is the definition.
'mondrian possibly almost his last' is the wordplay.
'mondrian possibly' becomes 'piet' (Piet Mondrian is an example).
'almost' means to remove the last letter (most of the word but not all of it).
'his last' becomes 'ta' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'piet' with its final letter removed is 'pie'.
'pie'+'ta'='PIETA'
'from' is the link.
(Other definitions for pieta that I've seen before include "Religious depiction" , "Statue of Mary and Jesus after the Crucifixion" , "Sculpture of Mary grieving over body of Jesus" , "statue of mary with body of christ" , "religious picture?" .)