Pinch one's nose (6)
I believe the answer is:
snitch
This clue could be a double definition.
'pinch' is the first definition.
(thesaurus)
'one's nose' is the second definition.
'snitch' can be an answer for 'nose' (thesaurus). I'm not certain of the 'one's' bit.
Can you help me to learn more?
(Other definitions for snitch that I've seen before include "Telltale (sl.)" , "Police informer" , "Whistleblower (informal)" , "Grass" , "who tells on his classsmate?" .)