Small mountain (4)
I believe the answer is:
hill
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small mountain</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hill that I've seen before include "Elevation on land" , "Fell" , "High mass of land" , "Mount" , "Raised area of land" .)