Tight hold
I believe the answer is:
grip
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tight hold</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 grip that I've seen before include "Domination" , "Ditch" , "Keep firm hold of" , "Clutch - holdall" , "Grasp, clutch" .)