Polytetrafluoroethylene (6)
I believe the answer is:
teflon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">polytetrafluoroethylene</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for teflon that I've seen before include "Synthetic resin to prevent sticking" , "Non-stick coating - evading blame" , "Non-stick coating (trademark)" , "Non-stick coating as for frying pans" , "It's coated on surface to prevent sticking" .)