Rank, level (7)
I believe the answer is:
echelon
This clue is a double definition.
'rank' is the first definition.
(I know that echelon is a type of rank)
'level' is the second definition.
(I've seen this before)
(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" .)