Ascertain by gathering facts (9)

I believe the answer is:

determine

'ascertain by gathering facts' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for determine that I've seen before include "Dictate" , "Come to a decision" , "conclusion" , "Discover" , "Choose" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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