Enter a clue or pattern or both:
The Clue
Several CBS dramas (4 letter answer)
The Answer
CSIS
Tags
Notes
The answer CSIS is so rare that it appears less than once every 2500 puzzles.
Related Clues
Collectors of DNA
A couple CBS spinoffs
Definition
CSIS as a noun:
1. (Canadian Security Intelligence Service, CSIS) = Canada's main foreign intelligence agency that gathers and analyzes information to provide security intelligence for the Canadian government