Officially accept (7)
I believe the answer is:
approve
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">officially accept</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for approve that I've seen before include "Say yes to" , "Commend; ratify" , "Give sanctions to" , "Pronounce (something) satisfactory" , "Like" .)