Jaded feeling (5)
I believe the answer is:
ennui
'jaded feeling' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ennui that I've seen before include "Bored listlessness" , "What's tedious and instils such listlessness" , "Result of boredom" , "Low interest rate" , "World-weariness" .)