Enter a clue or pattern or both:
The Clue
Slate (10 letter answer)
The Answer
BLACKBOARD
Tags
Notes
The answer BLACKBOARD is so rare that it appears less than once every 2900 puzzles.
Related Clues
Classroom feature
Schoolroom necessity
Teacher's aid
Where a student may solve a problem
Definition
BLACKBOARD as a noun:
1. (blackboard, chalkboard) = sheet of slate; for writing with chalk