Yellow pigment (5)
I believe the answer is:
ochre
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">yellow pigment</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ochre that I've seen before include "Yellow-red mineral from iron oxide used as pigment" , "Earth used in pigments" , "Earth-coloured pigment" , "Pale brownish-yellow colour or pigment" , "Yellow-orange hue" .)