Hill's partner (4)
I believe the answer is:
dale
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hill's partner</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dale that I've seen before include "Valley; Trollope's Bell and Lily" , "Lead into poetic valley" , "Up hill and down . . . ." , "depression" , "Valley, as in Yorkshire" .)