Answer: mischief

AnswerCrossword Clue
MISCHIEF... maker (imp)
MISCHIEFPRANKS
MISCHIEFCause of petty annoyance
MISCHIEFAnnoying behavior
MISCHIEFMs. Boss
MISCHIEFWhat imps get into
MISCHIEFMonkey business
MISCHIEFWhat Bart's up to
MISCHIEFBrat's forte
mischiefpetty misdeeds or annoyance
mischiefannoying conduct or activity
mischiefharm, trouble, or injury, caused willfully