Like atlas, unfortunately omitting one great feature of Utah (4,4)

I believe the answer is:

salt lake

'great feature of utah' is the definition.
(the Great Salt Lake is in Utah)

I don't understand the rest of the clue.

(Another definition for salt lake that I've seen is " Capital of Utah is . . . . . . . . City (4, 4),".)

I've seen this clue in The Guardian.

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