Hairless (4)
I believe the answer is:
bald
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hairless</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bald that I've seen before include "Without hair" , "Unadorned" , "Blunt; hairless" , "With the tread worn away" , "Plain; hairless" .)