City yearbook's choice of covers? (4)

I believe the answer is:

york

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'city' is the definition.
(York is a city)

I don't understand the remainder of the clue.

(Other definitions for york that I've seen before include "Home of some Mystery Plays" , "Eboracum (L)" , "City on the Ouse" , "Royal house (of the white rose)" , "Royal house in the Wars of the Roses" .)

I've seen this clue in The Telegraph.

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