Crossword Genius

Sentence-ending mark (6)

Ross

I believe the answer is:

period

'sentence-ending mark' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for period that I've seen before include "School session" , "Span of time" , "A portion of time" , "Stretch of time" , "Phase" .)

I've seen this clue in the Newsday.
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