Clergyman within beside another (4)
I believe the answer is:
dean
'clergyman' is the definition.
(dean is a kind of clergyman)
'within beside another' is the wordplay.
'within' indicates the answer is hidden within the clue.
'DEAN' is hidden within 'beside another'.
(Other definitions for dean that I've seen before include "Senior academic administrator" , "Small valley - cathedral dignitary" , "Senior church official" , "James ..., film star famous for his moody rebellious roles" , "FILMSTAR" .)