Tallest (7)
I believe the answer is:
highest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tallest</span>' is the definition.<br/ ><span class="explanation-format__explanation">('high' is associated in meaning with 'tall')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for highest that I've seen before include "Above all others" , "Tallest" , "Greatest (number)" , "Most elevated" , "Most exalted" .)