Clergyman is to organise an exhibition (6)
I believe the answer is:
curate
'clergyman' is the definition.
(assistant to a priest)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for curate that I've seen before include "Acuter (anag.)" , "assistant barman in Ireland" , "A truce (anag)" , "one coming between vicar and his flock" , "Organize a museum or exhibition" .)