Answer:

imp

Answer	Crossword Clue
IMP	Mischief maker
IMP	Rascal
IMP	Rule-breaker

IMP	Little demon
IMP	Scamp
IMP	Troublemaker
IMP	Little rascal
IMP	Urchin
IMP	Prankish pipsqueak
IMP	Mischief-maker
IMP	Little devil

IMP	Mischievous tyke
IMP	Sitter's handful
IMP	Sitter's nightmare
IMP	Babysitter's bane
IMP	Demonic tyke
IMP	Diminutive devil
IMP	"The Bottle ..." (Stevenson story)
IMP	Poe's "The ... of the Perverse"

IMP	Wish granter in a Stevenson short story
IMP	Squirt
IMP	Little pest
IMP	Pixie
IMP	Prankster
IMP	Hellion
IMP	Not quite a brat
IMP	Elf

IMP	Little troublemaker
IMP	Babysitter's handful
IMP	Rapscallion
IMP	Brat
IMP	Devilish sort
IMP	Devilish tot
IMP	Pesky little tyke
IMP	Sitter's challenge

IMP	Trickster
IMP	Little cut-up
IMP	Pain for a sitter
IMP	Pesky kid
IMP	Holy terror