Inane tot in front of teacher, in trouble for not listening (11)
I believe the answer is:
inattention
'not listening' is the definition.
'inane tot in front of teacher in trouble' is the wordplay.
'front of' says to take the initial letters.
'in trouble' is an anagram indicator.
The initial letter of 'teacher' is 't'.
'inane'+'tot'+'in'+'t'='inanetotint'
'inanetotint' with letters rearranged gives 'INATTENTION'.
'for' acts as a link.
(Other definitions for inattention that I've seen before include "Failure to concentrate" , "Failure to take notice" , "carelessness" , "Failure to watch or listen" , "Lack of concentration" .)