It "smiles on the frowning night," in "Romeo and Juliet"

MORN

Think of the time of day that follows the darkest hour, often described as breaking or dawning in poetry. Shakespeare contrasts it with the sadness of night in this play.

This clue quotes a line from Romeo and Juliet where the morning sun is described as "smiling on the frowning night," meaning dawn breaks after darkness. The word "morn" is an old-fashioned or poetic term for morning, fitting the play’s language. Since the clue directly references the line, the answer is simply the shortened form of "morning" used in the text.