Half expected learner to drive out (5)
I believe the answer is:
expel
'drive out' is the definition.
(I've seen this in another clue)
'half expected learner' is the wordplay.
'half' indicates taking half.
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'expected' with half the letters taken is 'expe'.
'expe'+'l'='EXPEL'
'to' acts as a link.
(Other definitions for expel that I've seen before include "Drive away" , "Remove from membership" , "Deport" , "Banish (undesirable alien?)" , "Kick out" .)