Some moan I'm a lawless beast (6)
I believe the answer is:
animal
'beast' is the definition.
(a beast is an animal)
'some moan i'm a lawless' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'ANIMAL' can be found hidden inside 'moan im a lawless'.
(Other definitions for animal that I've seen before include "something in the zoo?" , "Uncivilised person" , "Mammal" , "Such as 13 ac" , "' - - Farm', Orwell" .)