Insane novelties I've taken for granted have been illegally obtained (6)
I believe the answer is:
stolen
'illegally obtained' is the definition.
(I've seen this in another clue)
'insane novelties i've taken for granted have been' is the wordplay.
I cannot really see how this works, but
'taken' could be 'stole' (stealing is a kind of taking) and 'stole' is found within the answer.
A single letter 'n' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for stolen that I've seen before include "` `The ... Child' ' (Yeats)" , "Goods that have been taken dishonestly" , "Nicked" , "subject to plagiarism" , "Taken unlawfully" .)