Answer:

CPL

Answer	Crossword Clue
CPL	NCO
CPL	Sgt.'s underling
CPL	Pvt.'s superior

CPL	PFC's superior
CPL	USMC rank
CPL	Klinger's M.A.S.H. rank: Abbr.
CPL	Rank below Sgt.
CPL	Pfc's superior
CPL	Lowest-ranking NCO
CPL	Sgt.'s subordinate
CPL	Rank above Pfc.

CPL	Radar's rank: Abbr.
CPL	Double-chevron wearer: Abbr.
CPL	Mil. rank
CPL	NCO below Sgt.
CPL	Klinger's rank (abbr.)
CPL	Radar O'Reilly's rank (abbr.)
CPL	An NCO
CPL	Radar's rank (abbr.)

CPL	An N.C.O.
CPL	Pfc. superior
CPL	Certain NCO
CPL	Klinger's rank: Abbr.
CPL	PFC superior
CPL	Two-stripe soldier: Abbr.
CPL	Certain GI
CPL	Lance ... (USMC rank)

CPL	Specialist's superior: Abbr.
CPL	Radar, e.g.: Abbr.
CPL	Army man: Abbr.
CPL	NCO.
CPL	Two-chevron man: Abbr.
CPL	Chevron-wearer: Abbr.
CPL	Army rank: Abbr.
CPL	N.C.O.

CPL	Noncom: Abbr.
CPL	N C O
CPL	Army man, for short
CPL	He's between pfc. and sgt.
CPL	U.S. noncom

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.