Linen hue (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">linen hue</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 ecru that I've seen before include "natural colour" , "Greyish white" , "Neutral colour" , "Cure (anag) - unbleached linen" , "The Color" .)