Greyish-yellow (4)
I believe the answer is:
ecru
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">greyish-yellow</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 ecru that I've seen before include "off-white" , "Find a cure, strangely, in the colour" , "Stange cure for a colour" , "Buff or beige" , "Light fawn colour" .)