Instruct to provide transport (5)
I believe the answer is:
train
I believe this is a double definition.
'instruct' is the first definition.
(training is a kind of instructing)
'transport' is the second definition.
(train is a kind of transport)
'to provide' acts as a link.
(Other definitions for train that I've seen before include "Flying Scotsman, e.g." , "Locomotive plus carriages" , "become physically fit" , "held up in union action?" , "Procession" .)