Without the other, has gone off to somewhere in the US (6)

I believe the answer is:

oregon

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'somewhere in the us' is the definition.
I can't judge whether this definition defines the answer.

'without the other has gone off' is the wordplay.
'without' suggests deleting specific letters.
'has' means one lot of letters go next to another.
'off' is an anagram indicator.
'other' with 'the' taken away is 'or'.
'gone' anagrammed gives 'egon'.
'or'+'egon'='OREGON'

'to' is the link.

Can you help me to learn more?

(Other definitions for oregon that I've seen before include "Salem's state" , "US west-coast state" , "West coast US state" , "Old trail led here" , "Part of the US" .)

I've seen this clue in the Evening Standard.

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