Lawful (5)
There are a few possibilities for this:
legitimate
'lawful' is the definition.
(associated in meaning)
This is the entire clue.
(Other definitions for legal that I've seen before include "Constitutional" , "Authorised" , "sanctioned" , "Authorized" , "Above board" .)
'lawful' is the definition.
(synonyms)
This is the entire 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 the entire 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.
(synonyms)
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" .)