Rank, level (7)
I believe the answer is:
echelon
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">rank</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that echelon is a type of rank)</span><br/ ><br/ >'<span class="explanation-format__original">level</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for echelon that I've seen before include "Level or rank of authority, upper or lower" , "Body of troops arranged in a line" , "position in society" , "Military stepped formation" , "Offset-lines formation" .)