Untidy; dishevelled (7)
I believe the answer is:
unkempt
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">untidy</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >'<span class="explanation-format__original">dishevelled</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for unkempt that I've seen before include "Of uncared for appearance" , "Messy" , "Slovenly" , "shabby" , "Not neat or cared for" .)