Army colour (5)
I believe the answer is:
khaki
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">army colour</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for khaki that I've seen before include "Army dress material" , "Military hue" , "Sand-coloured" , "Dull brown colour" , "Dust-coloured" .)