Boredom being trapped by drunken nuisance (5)
I believe the answer is:
ennui
'boredom' is the definition.
(synonyms)
'trapped by drunken nuisance' is the wordplay.
'trapped' says the answer is hidden in the clue.
'ENNUI' is hidden in the letters of 'by drunken nuisance'.
'being' is the link.
(Other definitions for ennui that I've seen before include "Feeling of listlessness" , "tiredness" , "Bored listlessness" , "Boredom, listlessness" , "Boredom, dullness" .)