Experts; polishes (5)
I believe the answer is:
buffs
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">experts</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">polishes</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(buffing is a kind of polishing)</span><br/ ><br/ ></span>
(Other definitions for buffs that I've seen before include "Experts" , "Aficionados" , "Enthusiasts" .)