Increase dramatically (4)
I believe the answer is:
soar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">increase dramatically</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for soar that I've seen before include "Significant rise" , "Rise high into the air" , "Fly high into the air" , "lift" , "Fly high, Leicester river" .)