GK Chesterton's detective (6,5)

I believe the answer is:

father brown

'gk chesterton's detective' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for father brown that I've seen before include "famous solver" , "Chesterton character" , "G.K. Chesterton's detective character" , "10 [SLEUTH]" .)

I've seen this clue in The Guardian.

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