Enter a clue or pattern or both:
The Clue
Natl. registry org. (3 letter answer)
The Answer
SSS
Tags
Notes
The answer SSS is seen frequently, appearing about once every 60 puzzles.
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Conscription org.
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Registration agcy.
Snake sound
Snake's sound
Stovetop sound
Teakettle sound
'60s draft org.
Busy org. of W.W. II
Federal draft agcy.
Flat tire sound
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Subj. of 60's protest
Unhappy crowd sound
U.S. draft agcy.
Object of 60's protest: Abbr.
Definition
SSS as a noun:
1. (Selective Service, Selective Service System, SSS) = an independent federal agency that administers compulsory military service