Enter a clue or pattern or both:
The Clue
Technical inst. in the Windy City (3 letter answer)
The Answer
CTC
Tags
Notes
The answer CTC is so rare that it appears less than once every 2500 puzzles.
Definition
CTC as a noun:
1. (Counterterrorist Center, CTC) = an agency that helps the Director of Central Intelligence coordinate counterterrorist efforts in order to preempt and disrupt and defeat terrorist activities at the earliest possible stage