It’s very dark in Kentucky (4)

I believe the answer is:

inky

'it's very dark' is the definition.
(inky black)

'in kentucky' is the wordplay.
'kentucky' becomes 'ky'.
'in'+'ky'='INKY'

(Other definitions for inky that I've seen before include "Black; drunk (Aus. sl.)" , "Pitch-black" , "Coloured black" , "Black as pen fluid?" , "Like writing fluid" .)

I've seen this clue in The Times.

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