Out for reform in hearing lesson (8)
I believe the answer is:
tutorial
'lesson' is the definition.
(I've seen this before)
'out for reform in hearing' is the wordplay.
'for reform' indicates anagramming the letters (I've seen this in other clues).
'in' indicates putting letters inside.
'hearing' becomes 'trial' (I've seen this before).
'out' is an anagram of 'uto'.
'uto' inserted within 'trial' is 'TUTORIAL'.
(Other definitions for tutorial that I've seen before include "Teaching session for a small number of students" , "Private lesson" , "Period of individual instruction" , "University study period" , "Period of teaching as from college lecturer" .)