Civilian dress (5)
I believe the answer is:
mufti
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">civilian dress</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that mufti is a type of civilian dress)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mufti that I've seen before include "Civvies; Muslim legal expert" , "Civilian dress, worn by an off-duty soldier, say" , "No official dress" , "Plain clothes - Muslim law expert" , "Civilian clothing for a military person" .)