Nonsense, being forced to replace name with learner (6)
I believe the answer is:
drivel
'nonsense' is the definition.
(drivel can mean nonsensical speech or writing)
'being forced to replace name with learner' is the wordplay.
I cannot quite understand how this works, but
'being' could be 'dr' (Dr is an example) and 'dr' is located in the answer.
'name' could be 'ive' and 'ive' is located in the answer.
'learner' could be 'l' (as in a learner driver with L-plates on their car) and 'l' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for drivel that I've seen before include "Tosh" , "Worthless talk" , "Claptrap" , "Gibberish" , "Balls" .)