Decadent period: ingenuity has ten kinks (7,8)

I believe the answer is:

naughty nineties

'decadent period' is the definition.

'ingenuity has ten kinks' is the wordplay.
'kinks' indicates an anagram (kink can mean curve or twist).
'ingenuity'+'has'+'ten'='ingenuityhasten'
'ingenuityhasten' with letters rearranged gives 'NAUGHTY NINETIES'.

I've seen this clue in The Independent.

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