Seemingly faultless learner (6)

I believe the answer is:

novice

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'learner' is the definition.
(thesaurus)

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

(Other definitions for novice that I've seen before include "New member (of religious order)" , "Probationary nun/monk" , "Beginner, trio" , "A beginner or student nun" , "Person in a religious order who has not yet taken final vows" .)

I've seen this clue in the Evening Standard.

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