Dog that writes puzzles? (6)

I believe the answer is:

setter

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'dog' is the definition.
(setter is a type of dog)

I cannot understand how the remainder of the clue works.

(Other definitions for setter that I've seen before include "It helps to locate game" , "Late evening sun is a" , "Jelly, perhaps" , "Red - - , dog" , "Dog trained to scent game" .)

I've seen this clue in The Sun.

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