Lawful (5)
There are a few possibilities for this:
legitimate
'lawful' is the definition.
(associated in meaning)
This is all the clue.
(Other definitions for legal that I've seen before include "Constitutional" , "Authorised" , "sanctioned" , "Authorized" , "Above board" .)
'lawful' is the definition.
(I know that lawful can be written as licit)
This is all the clue.
(Other definitions for licit that I've seen before include "Allowed as by law, not forbidden" , "Legitimate" , "Not forbidden, lawful" , "Lawful, permitted" , "Permissible" .)
'lawful' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for valid that I've seen before include "Reasonable" , "Legally acceptable, unexpired" , "Sound, well-based" , "Effectual" , "Legitimate" .)
'lawful' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for legit that I've seen before include "Reliable" , "Honest (abbr)" , "allowed by law, shortly!" , "Authorised" , "Run away - above board (colloq)" .)
'lawful' is the definition.
(I know that lawful can be written as legitimate)
This is all the clue.
(Other definitions for legitimate that I've seen before include "In accordance with the rules" , "Genuine" , "Conforming to the law" , "authorised" , "Legal" .)