Arab revolutionary patrolling hospital in sheikhdom (7)

I believe the answer is:

bahrain

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

'arab revolutionary patrolling hospital in' is the wordplay.
'revolutionary' is a reversal indicator (letters revolve around).
'patrolling' becomes 'in' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'hospital' becomes 'H' (abbreviation for hospital on maps).
'in' indicates putting letters inside.
'arab' in reverse letter order is 'bara'.
'bara'+'in'='barain'
'barain' placed around 'h' is 'BAHRAIN'.

Can you help me to learn more?

(Other definitions for bahrain that I've seen before include "kingdom in Middle East" , "Arab sheikhdom" , "Gulf region?" , "Island country in the Persian Gulf" , "Gulf state" .)

I've seen this clue in The Times.

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