Clarity
Middle English (in the sense ‘glory, divine splendour’): from Latin claritas, from clarus ‘clear’. The current sense dates from the early 17th century.
wiktionary
From Middle English claritee, from Old French clarté, from Latin clāritās, from clārus(“clear”).
etymonline
clarity (n.)
c. 1300, clarte, clerte "brightness, radiance; glory, splendor," from Old French clerte, clartet (Modern French clarté) "clarity, brightness," from Latin claritas "brightness, splendor," also, of sounds, "clearness;" figuratively "celebrity, renown, fame," from clarare "make clear," from clarus "clear" (see clear (adj.)).
Modern form is first attested early 15c., perhaps a reborrowing directly from Latin. Original senses are obsolete; meaning "clearness" (of color, judgment, style, etc.) is from mid-15c.
