Enter a clue or pattern or both:
The Clue
Auto signal (9 letter answer)
The Answer
TAILLIGHT
Tags
Notes
The answer TAILLIGHT is so rare that it appears less than once every 2500 puzzles.
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Firefly component?
Definition
TAILLIGHT as a noun:
1. (taillight, tail lamp, rear light, rear lamp) = lamp (usually red) mounted at the rear of a motor vehicle