It's not a noise commonly heard when trapped in chalet (6,2)
I believe the answer is:
snowed in
'commonly heard when trapped in chalet' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'it's not a noise' is the wordplay.
I cannot quite understand how this works, but
'not' could be 'no' (I've seen this in other clues) and 'no' is present in the answer.
'noise' could be 'din' (din can mean a loud noise or disturbance) and 'din' is present in the answer.
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for snowed in that I've seen is " Trapped in winter".)