Answer: begood

AnswerCrossword Clue
BEGOODMom's admonition
BEGOODParent's reminder
BEGOOD"Act nice!"
BEGOOD"Behave yourself!"
BEGOODBehave yourself
BEGOOD"Don't misbehave!"
BEGOODParting words
BEGOOD"Lady, ...,"
BEGOODRequest from mom
BEGOOD"No horsing around!"
BEGOOD"No acting up!"
BEGOODParent's desperate request
BEGOOD"No misbehaving!"