Type of Christian turning up in certain universities (5)
I believe the answer is:
uniat
'type of christian' is the definition.
(I've seen this before)
'turning up in certain universities' is the wordplay.
'turning up' is a reversal indicator.
'in' says the answer is hidden in the clue.
'tainu' is hidden in the letters of 'certain universities'.
'tainu' backwards is 'UNIAT'.
(Other definitions for uniat that I've seen before include "Type of Christian" , "member of church" , "member of a Christian community" , "Eastern Christian; anti U (anag.)" .)