Highlands hillside (4)
I believe the answer is:
brae
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">highlands hillside</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for brae that I've seen before include "Bank of Scotland" , "Steep Scots hillside" , "Bare on Scottish hillside" , "Upland area in Scotland" , "bank on Clydeside" .)