Drained of colour (5)
I believe the answer is:
ashen
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">drained of colour</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ashen that I've seen before include "Having gone pale" , "pale in colour" , "Very pale, with shock or fear" , "lacking in colour" , "(Of face) pale (with shock)" .)