Writer of effortless poetry (3)

I believe the answer is:

poe

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'writer' is the definition.
(Edgar Allan Poe)

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

(Other definitions for poe that I've seen before include "Edgar Allan ..., American writer of the macabre" , "He wrote short stories" , "Name of writer" , "Entrance rooms; seeks support from" , "American author, d. 1849" .)

I've seen this clue in the Evening Standard.

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