The most common and most likely answer to this crossword clue is the 7 letter word NEVADAN
I've seen this crossword clue in The Daily Telegraph
N
E
V
A
D
A
N
More clues leading to the result NEVADAN
- Northern girl meets boy from Western state
- Article about Cameron withdrawn by New Statesman
- Nothing venerable arising from Las Vegas?
- Bread stuffed with endless duck for resident of US state
- Archdeacon returning to a tribe as US resident
- Nothing very exciting nearby, both heading northward from Reno, say?
- One coming from Las Vegas, perhaps in van Dean ordered
- Nothing venerable about American subject
- d Funny channel fuels article about New Statesman?
Buddy explains!

The straight part
We know that "One coming from Las Vegas, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one coming from las vegas, perhaps = nevadan.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.