Answer: HARDKNOCKS

AnswerCrossword Clue
HARDKNOCKSTough luck
HARDKNOCKSLessons from a tough school
HARDKNOCKSTough school
HARDKNOCKSSchool of ....
HARDKNOCKSWell-known school
HARDKNOCKSAdversities
HARDKNOCKS"School" lessons?
HARDKNOCKSProviders of life lessons
HARDKNOCKSAdversity
HARDKNOCKSRough school
HARDKNOCKSDifficulties in life