Adhere (5)
(Other definitions for cling that I've seen before include "Hold tightly, become attached" , "Hold, cleave" , "Be emotionally over-dependent" , "Grasp urgently" , "Stick - tinkle" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">adhere</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that adhere can be written as stick)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stick that I've seen before include "Flak - cling" , "Gear lever; adhere" , "Rod" , "Staff - criticism" , "Join firm" .)