Crossword Genius

Nice dean working for decades (8)

Ross

I believe the answer is:

decennia

'decades' is the definition.
('decennium' can be a synonym of 'decade')

'nice dean working' is the wordplay.
'working' indicates anagramming the letters.
'nice'+'dean'='nicedean'
'nicedean' anagrammed gives 'DECENNIA'.

'for' acts as a link.

(Another definition for decennia that I've seen is " 20 years at least".)

I've seen this clue in The Guardian.
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