State of Osaka's samurai (5)

I believe the answer is:

assam

'state' is the definition.
(I've seen this before)

'of osaka's samurai' is the wordplay.
'of' indicates the answer is hidden within the clue.
'ASSAM' is hidden in the letters of 'osakas samurai'.

(Other definitions for assam that I've seen before include "region out east" , "India tea-producing state" , "Indian tea-growing state" , "Type of tea" , "Indian province" .)

I've seen this clue in The Sun.

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