Silently agreeing (7)
I believe the answer is:
nodding
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">silently agreeing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for nodding that I've seen before include "Not showing much interest in" , "making careless mistakes" , "Indicating yes" , "Dozing (off)" , "Signing agreement" .)