Crossword Genius

High level promotion (7)

Ross

I believe the answer is:

upgrade

'promotion' is the definition.
(I've seen this before)

'high level' is the wordplay.
'high' becomes 'up' (associated in meaning).
'level' becomes 'grade' (synonyms).
'up'+'grade'='UPGRADE'

(Other definitions for upgrade that I've seen before include "Improve equipment or promote" , "Raise in status or quality" , "Drug ape to improve" , "Improve, enhance" , "Improvement" .)

I've seen this clue in The Telegraph.
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