Collect and organise copper to meet judge and minister (6)

I believe the answer is:
curate
'minister' is the definition.
(I know that minister can be written as curate)
'collect and organise copper to meet judge' is the wordplay.
I cannot really see how this works, but
'copper' could be 'cu' (Cu is the chemical symbol for copper) and 'cu' is present in the answer.
'judge' could be 'rate' (rating is a kind of judging) and 'rate' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'and' acts as a link.
Can you help me to learn more?
(Other definitions for curate that I've seen before include "Assistant clergyman" , "Parson" , "look after collection" , "Member of the clergy" , "one coming between vicar and his flock" .)
