I’m training learner to drive (5)
I believe the answer is:
impel
'to drive' is the definition.
(I've seen this in another clue)
'i'm training learner' is the wordplay.
'training' becomes 'PE' (Physical Education).
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'im'+'pe'+'l'='IMPEL'
(Other definitions for impel that I've seen before include "Force to act" , "Constrain" , "Urge forward, drive" , "Make" , "Send or drive forward" .)