Plain clothes (5)
I believe the answer is:
mufti
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plain clothes</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mufti that I've seen before include "Plain clothes - Muslim legal expert" , "Non-military clothing" , "Civilian clothing; Muslim legal expert" , "Civilian clothing for a military person" , "Civilian dress (for serviceman)" .)