Let through (6)
I believe the answer is:
okayed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">let through</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for okayed that I've seen before include "Sanctioned" , "Authorised" , "Gave informal approval" , "given thumbs up" , "Allowed" .)