Concern resolved (4)

I believe the answer is:

firm

I believe this clue is a double definition.

'concern' is the first definition.
(firm is a kind of concern)

'resolved' is the second definition.
(thesaurus)

(Other definitions for firm that I've seen before include "Steady commercial organisation?" , "Company; steady" , "Business company" , "Tight; company" , "Determined" .)

I've seen this clue in The Telegraph.

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