Polish partner (4)
I believe the answer is:
spit
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">polish partner</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 spit that I've seen before include "Coastal feature, tongue of sand" , "Slaver" , "Sand bar" , "little light rain" , "cook a roast?" .)