Lesson (5)
'lesson' is the definition.
(as in the moral of the story)
This is all the clue.
(Other definitions for moral that I've seen before include "Virtuous and principled" , "Relating to good and evil" , "Underlying significance of a story or event" , "Lesson offered by story" , "Concerned with principles of right and wrong" .)
(Other definitions for seminar that I've seen before include "Training conference" , "University discussion" , "workshop" , "Group discussion of subject" , "Study group on specific subject" .)