Something that smells in casino security (4)

I believe the answer is:

nose

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'something that smells' is the definition.
I can't tell whether this defines the answer.

'in casino security' is the wordplay.
'in' indicates a hidden word.
'NOSE' is hidden in the letters of 'casino security'.

Can you help me to learn more?

(Other definitions for nose that I've seen before include "Flair (for wine)" , "Don't cut this off to spite your face" , "Pry" , "It detects by smell" , "Olfactory organ" .)

I've seen this clue in The Sun.

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