Student, I ne'er worked, being not bothered (12)
I believe the answer is:
uninterested
'not bothered' is the definition.
'student i ne'er worked' is the wordplay.
'worked' is an anagram indicator.
'student'+'i'+'neer'='studentineer'
'studentineer' anagrammed gives 'UNINTERESTED'.
'being' acts as a link.
(Other definitions for uninterested that I've seen before include "Bored" , "Apathetic" , "Not concerned" , "indifferent" .)