Keep this bouquet clean to avoid trouble (4)

I believe the answer is:

nose

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'keep this bouquet clean to avoid trouble' is the definition.
'nose' can be an answer for 'bouquet' (both can mean a smell). I'm not certain of the rest of the definition.

This is all the clue.

Can you help me to learn more?

(Other definitions for nose that I've seen before include "Facial part" , "Informer" , "Snout" , "Nuzzle" , "front part of vehicle" .)

I've seen this clue in The Globe and Mail.

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