Enter a clue or pattern or both:
The Clue
Cat killer (9 letter answer)
The Answer
CURIOSITY
Tags
Notes
The answer CURIOSITY is so rare that it appears less than once every 2500 puzzles.
Definition
CURIOSITY as a noun:
1. (curiosity, wonder) = a state in which you want to learn more about something
2. (curio, curiosity, oddity, oddment, peculiarity, rarity) = something unusual -- perhaps worthy of collecting