Most wan (6)
I believe the answer is:
palest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">most wan</span>' is the definition.<br/ ><span class="explanation-format__explanation">('pale' can be a synonym of 'wan')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for palest that I've seen before include "Most light in colour" , "Of the lightest colour" , "Most blanched" , "Most lightly coloured" .)