Scotland's Ness or Lomond (4)

I believe the answer is:

loch

(Other definitions for loch that I've seen before include "A Scottish lake like Lomond" , "A Scottish lake like Ness" , "Eg, Ness" , "Scottish word for lake" , "Ness or Lomond, for instance" .)

I've seen this clue in The New York Times.

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