clearing mark

13 LETTERS · STARTS WITH C

clearing mark is a valid 13-letter word worth 21 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3L1E1A1R1I1N1G2M3A1R1K5

3 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 3 + 1 + 1 + 5 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does clearing mark mean?