Crossword Genius

Having removed embarrassing smell, scientist brought back stink (4)

Ross

I believe the answer is:

niff

I'm a little stuck... Click here to teach me more about this clue!

'stink' is the definition.
(I know that niff is a type of stink)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for niff that I've seen before include "a stink" , "Hum" .)

I've seen this clue in The Guardian.
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