Type of hair-do (4)
I believe the answer is:
afro
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">type of hair</span>' is the first definition.<br/ ><br/ >'<span class="explanation-format__original">do</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(type of hairdo)</span><br/ ><br/ ></span>
(Other definitions for afro that I've seen before include "Retro hairdo" , "Type of 18" , "Bushy hairstyle" , "One cut" , "shock treatment?" .)