Indian peasant at entrance to university (5)
I believe the answer is:
hindu
'indian' is the definition.
(most Hindus are Indian)
'peasant at entrance to university' is the wordplay.
'peasant' becomes 'hind' (archaic term for a peasant).
'at entrance' says to take the initial letters.
The initial letter of 'university' is 'u'.
'hind'+'u'='HINDU'
(Other definitions for hindu that I've seen before include "religious type" , "Follower of India's most popular religion" , "Follower of a major religion of the Indian subcontinent" , "Devotee of Indian religion" , "One practising an Indian religion" .)