Vibrate (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vibrate</span>' is the definition.<br/ ><span class="explanation-format__explanation">(juddering is a kind of vibrating)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for judder that I've seen before include "Shake or vibrate rapidly" , "Strong vibration" , "Shake/vibrate forcefully" , "Vibrate violently" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vibrate</span>' is the definition.<br/ ><span class="explanation-format__explanation">(shaking is a kind of vibrating)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for shake that I've seen before include "Upset" , "Flavoured milk drink" , "Tremble, quake" , "rock" , "wave" .)