Significant skill of narrator? (7)

I believe the answer is:

telling

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

I can't explain the rest of the clue.

(Other definitions for telling that I've seen before include "influential" , "Effective - narration" , "relation" , "Providing information" , "Powerful - effective" .)

I've seen this clue in The Times.

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