Darling invention of J.M. Barrie (5)

I believe the answer is:

wendy

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'barrie' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

I don't understand the rest of the clue.

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(Other definitions for wendy that I've seen before include "Peter Pan's friend" , "31's friend" , "Art-loving Sister (TV)" , "Peter's girl-friend" , "Girl associated with 13" .)

I've seen this clue in the Evening Standard.

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