Colour of military uniforms (5)
I believe the answer is:
khaki
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">colour of military uniforms</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for khaki that I've seen before include "Military fabric" , "Drab military colour" , "'Colour, often used for military uniforms (5)'" , "Yellowish brown (used by military)" , "Drably coloured" .)