Crossword Genius

Plane passenger hopes for this hill! (7)

Ross

I believe the answer is:

upgrade

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'this hill' is the definition.
(thesaurus)

I can't explain the rest of the clue.

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(Other definitions for upgrade that I've seen before include "promotion" , "Get better travel conditions" , "Improvement" , "Raise to higher standard" , "'Improve, travel status perhaps (7)'" .)

I've seen this clue in the Sydney Morning Herald.
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