Sudden pull (3)
I believe the answer is:
tug
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sudden pull</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tug that I've seen before include "Tow boat" , "Haul" , "Boat to pull larger ones" , "Small ship for pulling" , "Powerful boat" .)