Enter a clue or pattern or both:
The Clue
Blur, in printing (6 letter answer)
The Answer
MACULE
Tags
Notes
The answer MACULE is so rare that it appears less than once every 2500 puzzles.
Definition
MACULE as a noun:
1. (macule, macula) = a patch of skin that is discolored but not usually elevated; caused by various diseases