Nonsense! Take the wheel beside the learner (6)
I believe the answer is:
drivel
'nonsense' is the definition.
(drivel can mean nonsensical speech or writing)
'take the wheel beside the learner' is the wordplay.
'take the wheel' becomes 'drive' (I've seen this in another clue).
'beside' is a charade indicator (letters next to each other) (I've seen this in other clues).
'the learner' becomes 'l' (as in a learner driver with L-plates on their car).
'drive'+'l'='DRIVEL'
(Other definitions for drivel that I've seen before include "Silly talk, sheer nonsense" , "Nonsense, garbage" , "Gibberish" , "Nonsensical talk" , "Verbal nonsense, rubbish" .)