Great success that’s central to patriotism (4)

I believe the answer is:

riot

'great success' is the definition.
(thesaurus)

'central to patriotism' is the wordplay.
'central' says to take the centre.
The middle of 'patriotism' is 'RIOT'.

'that's' is the link.

(Other definitions for riot that I've seen before include "Crowd violence" , "Ruckus, insurrection" , "The unruly may run this" , "Run amok" , "Civil disturbance" .)

I've seen this clue in The Times.

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