Enter a clue or pattern or both:
The Clue
Not recognized (10 letter answer)
The Answer
UNOFFICIAL
Tags
Notes
The answer UNOFFICIAL is so rare that it appears less than once every 2500 puzzles.
Definition
UNOFFICIAL as an adjective:
1. not having official authority or sanction; "a sort of unofficial mayor"; "an unofficial estimate"; "he participated in an unofficial capacity"
2. not officially established; "the early election returns are unofficial"