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"smell" is also used as a crossword clue. If that's what you saw, the answer is often odour (5 letters).
Definitions
A scent or odor; also the sense that detects it.
Used in a sentence
“I love the smell of fresh bread.”
“I’m just saying, this has a bad smell to it.”
“I can smell fresh bread.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Notice by the nose”5 letters
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