Answer: impish

AnswerCrossword Clue
IMPISHNaughty, but not too
impishmischievous
impishof, pertaining to, or characteristic of an imp
IMPISHLike a troublemaker
IMPISHPranksome
IMPISHPucklike
IMPISHLike Mr. Mxyzptlk
IMPISHLike a playfully naughty grin
IMPISHNaughty
IMPISHLike a little devil
IMPISHBratty
IMPISHProne to pranks
IMPISHRascally
IMPISHLike a mischief-maker
IMPISHSlightly naughty
IMPISHMischievous
IMPISHLike a mischief-maker's grin
IMPISHFull of mischief