Type of varnish (7)
I believe the answer is:
lacquer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">type of varnish</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lacquer that I've seen before include "Finish similar to varnish" , "coat for protection" , "Shellac and alcohol hair spray" , "Varnish; hair-spray" , "Hard shiny covering on wood and metal" .)