The Days of The Raj (3)

I believe the answer is:

era

'the days' is the definition.
(thesaurus)

'of the raj' is the wordplay.
'of' indicates the answer is hidden within the clue.
'ERA' is hidden in the letters of 'the raj'.

(Other definitions for era that I've seen before include "Long period of history" , "Important historical period" , "Major division of geological time" , "quite some time" , "Cycle" .)

I've seen this clue in The Telegraph.

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