Poulenc's last score ended dramatically — thus? (11)
I believe the answer is:
'poulenc's' is the definition.
Both the answer and definition are singular nouns.
Perhaps you can see a link between them that I can't see?
'last score ended dramatically thus?' is the wordplay.
I cannot really see how this works, but
'last' could be 'end' (I've seen this in another clue) and 'end' is located in the answer.
an anagram of 'score' is 'resco' which is present in the remaining letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for decrescendo that I've seen before include "(Musically) become quieter" , "Reduction in sound volume" , "Decrease in loudness (music)" , "With decreasing loudness (mus.)" , "decline" .)