Hem's partner (3)
I believe the answer is:
haw
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hem'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 haw that I've seen before include "Fruit of common thorn tree (3)" , "Hem and . . . - grope for words" , "Small red berry of a thorny tree" , "Hedgerow fruit" , "Fruit of a thorny bush" .)