Likable miscreant (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
rascal
(Other definitions for rascal that I've seen before include "Mischievous fellow" , "A mischievous and maybe dishonest person" , "not one to be admired" , "Mischievous person or confused lascar" , "A scoundrel or scamp" .)