Crossword Genius

Feature one runs occasionally (4)

Ross

I believe the answer is:

nose

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

'feature' is the definition.
(I know that nose is a type of science)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for nose that I've seen before include "Facial part" , "In-your-face" , "Conk (slang)" , "Nuzzle" , "Hooter" .)

I've seen this clue in The Telegraph.
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