Noble academic entrance without name (7)
I believe the answer is:
magnate
'noble' is the definition.
(thesaurus)
'academic entrance without name' is the wordplay.
'academic' becomes 'ma'.
'entrance' becomes 'gate' (type of entrance).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'name' becomes 'n' (common abbreviation e.g. on forms).
'gate' going around 'n' is 'gnate'.
'ma'+'gnate'='MAGNATE'
(Other definitions for magnate that I've seen before include "Important fellow" , "Wealthy business leader" , "Fellow with a lot of money" , "Baron" , "Wealthy figure" .)