Extra capital (5)

I believe the answer is:

super

I believe this clue is a double definition.

'extra' is the first definition.
(thesaurus)

'capital' is the second definition.
(thesaurus)

(Other definitions for super that I've seen before include "Prefix meaning terrific or great" , "Prefix meaning above or informally great" , "Great; wonderful" , "Excellent; police officer" , "Outstanding" .)

I've seen this clue in The Globe and Mail.

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