Suffering from this, listen listlessly to unending night of Paris? (5)
I believe the answer is:
ennui
This clue could be a double definition.
'suffering' is the first definition.
The answer and definition can be both feelings as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'this listen listlessly to unending night of paris?' is the second definition.
The definition suggests a singular noun which matches the answer.
'from' is the link.
Can you help me to learn more?
(Other definitions for ennui that I've seen before include "Low interest rate" , "Feeling of disaffection" , "Bored listlessness" , "The feeling of being bored" , "Lower interest rate" .)