Rascal lived badly (5)
I believe the answer is:
devil
'rascal' is the definition.
(I've seen this in another clue)
'lived badly' is the wordplay.
'badly' is an anagram indicator (letters in the wrong order).
'lived' with letters rearranged gives 'DEVIL'.
(Other definitions for devil that I've seen before include "Archfiend" , "Lived with Satan" , "Old Nick, Satan" , "Wicked spirit" , "Beast" .)