Bare rocky hill (3)
I believe the answer is:
tor
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bare rocky hill</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tor that I've seen before include "Rot about the rocky height" , "Rot on a Cornish hill" , "A rocky hill in Devon" , "Rocky prominence" , "eminence" .)