Enter a clue or pattern or both:
The Clue
Command ctrs. (3 letter answer)
The Answer
HQS
Tags
Notes
The answer HQS is rarely seen, appearing only about once every 1300 puzzles.
Related Clues
Administration ctrs.
C.E.O.'s places
C.O.'s hangouts
Command centers: Abbr.
Command posts: Abbr.
Command posts, for short
Mil. command bases
Mil. command centers
Definition
HQ as a noun:
1. (headquarters, HQ, military headquarters) = the military installation from which a commander performs the functions of command; "the general's headquarters were a couple of large tents"