Scale, ascend (5)
I believe the answer is:
climb
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">scale</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that scale is a more specific form of the action climb)</span><br/ ><br/ >'<span class="explanation-format__original">ascend</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(climbing is a kind of ascending)</span><br/ ><br/ ></span>
(Other definitions for climb that I've seen before include "Rise (in value, status)" , "Ascend, scale" , "Ascend, escalate" , "Walk up" , "Go up - scale" .)