Enter a clue or pattern or both:
The Clue
Signaling devices (7 letter answer)
The Answer
BUZZERS
Tags
Notes
The answer BUZZERS is so rare that it appears less than once every 2500 puzzles.
Definition
BUZZER as a noun:
1. (doorbell, bell, buzzer) = a push button at an outer door that gives a ringing or buzzing signal when pushed
2. a signaling device that makes a buzzing sound