Clergyman wants king always close (8)
I believe the answer is:
reverend
'clergyman' is the definition.
(I know that clergyman can be written as reverend)
'king always close' is the wordplay.
'king' becomes 'R' (abbreviation for rex, king in Latin).
'always' becomes 'ever' (synonyms).
'close' becomes 'end' (close can mean to end or finish).
'r'+'ever'+'end'='REVEREND'
'wants' is the link.
(Other definitions for reverend that I've seen before include "(Form of address to) clergyman" , "Vicar's title" , "Cleric's title" , "Minister" , "Title of respect for a member of the clergy" .)