Camp lavatory (7)
I believe the answer is:
latrine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">camp lavatory</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 latrine that I've seen before include "public toilet" , "Toilet in a military area" , "where to go in the army" , "waste disposal unit" , "Reliant on military loo" .)