Tail motions (4)
I believe the answer is:
wags
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tail motions</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 wags that I've seen before include "Moves briskly to and fro with swag (4)" , "group with team players, esp when travelling" , "Habitual jokers" , "Moves to and fro like dog's tail" .)