Hint Jack is being hidden up by the clergyman (6)
I believe the answer is:
curate
'the clergyman' is the definition.
(assistant to a priest)
'hint jack is being hidden up' is the wordplay.
I cannot quite understand how this works, but
'being' could be 'rat' (rat is a kind of being) and 'rat' is found in the answer.
'hint' could be 'cue' (cue can mean a hint or prompt) and 'cue' is found in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
'by' is the link.
Can you help me to learn more?
(Other definitions for curate that I've seen before include "A truce (anag)" , "assistant barman in Ireland" , "Church of England clergyman" , "Organize a museum or exhibition" , "Clergyman assisting a vicar" .)