Move in waves (8)
I believe the answer is:
undulate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">move in waves</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 undulate that I've seen before include "Move with a wave-like motion" , "Rise and fall like waves" , "Go gently up and down" , "Move with a rising and falling motion" , "Move like waves" .)