Farthest (7)
I believe the answer is:
extreme
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">farthest</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for extreme that I've seen before include "Greatest or smallest" , "Drastic; outermost" , "sheer" , "Sharp" , "Farthest - drastic" .)