Turn aside suddenly (6)
I believe the answer is:
swerve
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">turn aside suddenly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for swerve that I've seen before include "Sharp turn" , "Move aside quickly" , "Suddenly move off course" , "Change course abruptly" , "Suddenly go off course" .)