Lawful, legal (5)
I believe the answer is:
licit
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">lawful</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that lawful can be written as licit)</span><br/ ><br/ >'<span class="explanation-format__original">legal</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for licit that I've seen before include "Legitimate" , "OK?" , "Honest" , "Permitted by law" , "in order" .)