Signals agreement (4)
I believe the answer is:
nods
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">signals agreement</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 nods that I've seen before include "is about to crash?" , "Makes mistake" , "Non-verbal indications of assent" , "gestures in agreement" , "Shows assent" .)