Polished (6)
I believe the answer is:
smooth
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">polished</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for smooth that I've seen before include "Not rough or wrinkled" , "Glossy" , "Free from roughness, bumps etc." , "Not uneven or rough" , "Do ironing" .)