Apathetic rude teen isn't misbehaving (12)

I believe the answer is:

uninterested

'apathetic' is the definition.
('uninterested' can be similar in meaning to 'apathetic')

'rude teen isn't misbehaving' is the wordplay.
'misbehaving' indicates an anagram.
'rude'+'teen'+'isnt'='rudeteenisnt'
'rudeteenisnt' with letters rearranged gives 'UNINTERESTED'.

(Other definitions for uninterested that I've seen before include "Apathetic" , "indifferent" , "Not concerned" , "Bored" .)

I've seen this clue in The Telegraph.

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