He has a telling part in play (8)

I believe the answer is:

narrator

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'he has a telling part in play' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

This is all the clue.

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(Other definitions for narrator that I've seen before include "Soryteller" , "The one who tells the story" , "Someone who tells a story" , "Storyteller" , "He tells the story - arrant or what?" .)

I've seen this clue in The Guardian and The Globe and Mail.

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