End timeless piano piece by Chopin in silence (8)
I believe the answer is:
quietude
'silence' is the definition.
(thesaurus)
'end timeless piano piece by chopin' is the wordplay.
I cannot really see how this works, but
'piece' could be 'etude' (etude is a kind of piece) and 'etude' is present in the answer.
This explanation may well be incorrect...
'in' is the link.
Can you help me to learn more?
(Other definitions for quietude that I've seen before include "State of calmness" , "Tranquillity" , "peace?" , "serenity" .)