A little mischief-maker, a scallywag, a rogue (6)
I believe the answer is:
rascal
I believe this is a triple definition!
'a little mischief-maker' is the first definition.
(I've seen this in another clue)
'a scallywag' is the second definition.
(synonyms)
'a rogue' is the third definition.
(I know that rogue can be written as rascal)
(Other definitions for rascal that I've seen before include "Mischievous fellow" , "Mischievous or cheeky child" , "not one to be admired" , "Impudent child" , "Rogue of a lascar" .)