Dye, pigment (6)
I believe the answer is:
colour
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">dye</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that dye can be written as colour)</span><br/ ><br/ >'<span class="explanation-format__original">pigment</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that pigment can be written as colour)</span><br/ ><br/ ></span>
(Other definitions for colour that I've seen before include "Tinge - distort" , "Hue, tint" , "See 10" , "Distort; blush; hue" , "Pigment, paint or dye" .)