Document, it legally covers license (7)
I believe the answer is:
entitle
'license' is the definition.
(I've seen this in another clue)
'document it legally covers' is the wordplay.
'covers' indicates a hidden word (I've seen 'covered' mean this (the answer is covered up by the clue)).
'ENTITLE' is hidden within 'document it legally'.
(Other definitions for entitle that I've seen before include "Furnish with a right or claim" , "Licence" , "Warrant" , "Call; permit" , "Qualify, empower" .)