Prepare for a future role (5)
I believe the answer is:
train
'prepare for a future role' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for train that I've seen before include "Suite; give practice (in)" , "Succession of carriages" , "Prepare oneself by exercising" , "union's lengthy item" , "Choo-choo or part of wedding dress" .)