Faculty head within beside another (4)
I believe the answer is:
dean
'faculty head' is the definition.
(head of a university department)
'within beside another' is the wordplay.
'within' indicates the answer is hidden within the clue.
'DEAN' can be found hidden inside 'beside another'.
(Other definitions for dean that I've seen before include "school head" , "Administrator of a college department" , "Clergyman; narrow valley" , "Kind of clergyman or university official" , "Senior church official" .)