"I've learned my ___" (6)
I believe the answer is:
lesson
(Other definitions for lesson that I've seen before include "Unit of instruction" , "Seminar" , "warning message" , "Severe reproof" , "Spell of teaching" .)
I believe the answer is:
lesson
(Other definitions for lesson that I've seen before include "Unit of instruction" , "Seminar" , "warning message" , "Severe reproof" , "Spell of teaching" .)