Tor (4)
I believe the answer is:
hill
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tor</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hill that I've seen before include "See 14" , "Any one of three F1 driving champions" , "High point, but not a mountain" , "Canvasser of opinions" , "Mound (of mole, ants)" .)