Rebel in south calling for immediate attention (9)

I believe the answer is:

insurgent

'rebel' is the definition.
(I know that rebel can be written as insurgent)

'in south calling for immediate attention' is the wordplay.
'south' becomes 'S' (abbreviation).
'calling for immediate attention' becomes 'urgent' (I've seen this before).
'in'+'s'+'urgent'='INSURGENT'

(Other definitions for insurgent that I've seen before include "Rebel, revolutionary" , "Revolting" , "Unresting like a rebel" , "rising" , "freedom fighter" .)

I've seen this clue in The Times.

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