Favourable opinion (8)
I believe the answer is:
approval
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">favourable opinion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for approval that I've seen before include "On it, goods may be returned if not satisfactory" , "Go-ahead" , "Ratification" , "Approbation, favour" , "Green light" .)