Where to see scholars getting on train? (8,6)
I believe the answer is:
boarding school
'where to see scholars' is the definition.
'getting on train?' is the wordplay.
'getting on' becomes 'boarding' ('board' can be a synonym of 'get on').
'train?' becomes 'school' (training is a kind of schooling).
'boarding'+'school'='BOARDING SCHOOL'
(Other definitions for boarding school that I've seen before include "Winchester, maybe" , "Greyfriars, maybe" , "Winchester, perhaps" , "Eton, say" , "Roedean, say" .)