Blue shade (4)

I think it could be either:

navy

teal

'blue shade' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for teal that I've seen before include "Small freshwater duck and colour" , "Strange tale of a duck" , "Small river duck" , "Variety of small ducks" , "Dark green-blue; duck" .)

I've seen this clue in The New York Times, the King Feature Syndicate and The Wall Street Journal.

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