Enter a clue or pattern or both:
The Clue
Like certain patrol cars (8 letter answer)
The Answer
UNMARKED
Tags
Notes
The answer UNMARKED is so rare that it appears less than once every 2500 puzzles.
Definition
UNMARKED as an adjective:
1. not having an identifying mark; "unmarked cards"; "an unmarked police car"
2. (overlooked, unmarked, unnoted) = not taken into account; "his retirement was not allowed to go unmarked"