Yellow-brown pigment (6)
I believe the answer is:
sienna
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">yellow-brown pigment</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 sienna that I've seen before include "yellowy-brown" , "colouring" , "Raw -; burnt -" , "Browny-yellow pigment" , "-- Sauce; -- toast" .)