Stick fast to (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stick fast to</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 adhere that I've seen before include "Stay attached" , "Hold fast, stand by" , "Header (anag)" , "Stick to, remain loyal" , "Agree" .)
(Other definitions for cleave that I've seen before include "Divide by chopping, or cling" , "Split with the grain" , "Stick fast; split" , "Part" , "Cut (with an axe?)" .)