Class with not as much working (6)
I believe the answer is:
lesson
'class' is the definition.
(I've seen this before)
'with not as much working' is the wordplay.
'with' is a charade indicator (letters next to each other).
'not as much' becomes 'less' (similar in meaning).
'working' becomes 'on' (on can mean working or activated).
'less'+'on' is 'LESSON'.
(Other definitions for lesson that I've seen before include "Portion of the scriptures read in church" , "15 down period" , "Teaching period" , "Teaching session or Bible passage" , "Class session or reading from Bible" .)