Enter a clue or pattern or both:
The Clue
Slate used to ID film shots (9 letter answer)
The Answer
CLAPBOARD
Tags
Notes
The answer CLAPBOARD is so rare that it appears less than once every 2500 puzzles.
Definition
CLAPBOARD as a noun:
1. (clapboard, weatherboard, weatherboarding) = a long thin board with one edge thicker than the other; used as siding by lapping one board over the board below
CLAPBOARD as a verb:
1. cover with clapboards