Strategist getting to pin down artist in conversation? (9)

I believe the answer is:

tactician

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'strategist' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

(Other definitions for tactician that I've seen before include "Skilful mover" , "Adroit manoeuvrer" , "Coordinator of military" , "Smart mover" , "Chess player" .)

I've seen this clue in The Guardian.

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