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"clarify" is also used as a crossword clue. If that's what you saw, the answer is often enlighten (9 letters).
Definitions
make clear by removing impurities or solids, as by heating
Word origin
From Middle English clarifien, from Old French clarifiier, from Latin clārificō, clārificāre; clārus (“clear”) + faciō, facere (“make”). Semantically clear + -ify.
Used in a sentence
“What's the best way to clarify cooking oil?”
“Leave the wine for 24 hours and it will clarify.”
“Please clarify what you mean by this.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Explain plainly”7 letters
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