Answer: SGTS

AnswerCrossword Clue
SGTSBilko and York: Abbr.
SGTSYork and Snorkel: Abbr.
SGTSYork and Pepper: Abbr.
SGTSYork and Preston: Abbr.
SGTSMany DIs
SGTSCapt. saluters
SGTSSome are first class: Abbr.
SGTSBoot camp NCOs
SGTSPepper et al.: Abbr.
SGTSBilko and Preston: Abbr.
SGTSYork and Friday: Abbr.
SGTSFriday et al.: Abbr.
SGTSMil. three-stripers
SGTSPD ranks
SGTSSome PX patrons
SGTSThey may be first class: Abbr.
SGTSCapts.' inferiors
SGTSPvt. instructors
SGTSOnes giving marching orders: Abbr.
SGTSSnorkel and Pepper (abbr.)
SGTSFigs. in many police procedurals
SGTSDIs, often
SGTSSome NCOs
SGTSUS Army officers
SGTSYork and O'Rourke
SGTSCpl.'s superiors
SGTSDrill leaders (abbr.)
SGTSCpt.'s superiors
SGTSThree-stripers (abbr.)
SGTSCpls.' superiors
SGTSSuperiors to cpls.
SGTSE-5s
SGTSBilko, York, et al.
SGTSCertain NCOs
SGTSPepper et al. (abbr.)
SGTS"Boston's Finest" figs.
SGTSBoot-camp ldrs.
SGTSNCOs using drills
SGTSPepper and Preston: Abbr.
SGTSSome drillers: Abbr.