School transport (5)
I believe the answer is:
train
I believe this is a double definition.
'school' is the first definition.
(training is a kind of schooling)
'transport' is the second definition.
(train is a kind of transport)
(Other definitions for train that I've seen before include "Flying Scotsman, e.g." , "Rail service" , "something along those lines?" , "Trailing material on dress" , "Teach, series (of events)" .)