Sadly, pulpit’s come apart (5,2)
I believe the answer is:
split up
'come apart' is the definition.
('split up' can be a synonym of 'come apart')
'sadly pulpit's' is the wordplay.
'sadly' indicates an anagram.
'pulpits' with letters rearranged gives 'SPLIT UP'.
(Other definitions for split up that I've seen before include "Parted company" , "Part company" , "Separate" , "Take apart" , "End a relationship" .)