Posh commended being elevated (8)
I believe the answer is:
upraised
'being elevated' is the definition.
(I've seen this before)
'posh commended' is the wordplay.
'posh' becomes 'u' (abbreviation for upper-class - opposite to non-U).
'commended' becomes 'praised' (I've seen this in another clue).
'u'+'praised'='UPRAISED'
(Other definitions for upraised that I've seen before include "given a boost" , "Elevated" , "Lifted" , "Exalted" , "promoted" .)