Setter's construction is most succinct (7)

I believe the answer is:

tersest

'most succinct' is the definition.
(I've seen this in another clue)

'setter's construction' is the wordplay.
'construction' is an anagram indicator (answer constructed from certain letters).
'setters' is an anagram of 'TERSEST'.

'is' acts as a link.

I've seen this clue in The Guardian.

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