Di leaves board member for clergyman (6)
I believe the answer is:
rector
'for clergyman' is the definition.
(rector is a kind of clergyman)
'di leaves board member' is the wordplay.
'leaves' suggests deleting specific letters.
'board member' becomes 'director' (I've seen this before).
'director' with 'di' taken out is 'RECTOR'.
(Other definitions for rector that I've seen before include "Cleric" , "Member of the clergy" , "Head of some colleges" , "Parish clergyman" , "Parish priest" .)