Clergymen or board members Di dismissed (7)
I believe the answer is:
rectors
'clergymen' is the definition.
(rector is a kind of clergyman)
'board members di dismissed' is the wordplay.
'board members' becomes 'directors' (I've seen this before).
'dismissed' is a deletion indicator.
'directors' with 'di' taken out is 'RECTORS'.
'or' is the link.
(Other definitions for rectors that I've seen before include "ministers" , "Clergymen" .)