Elated having been promoted (8)
I believe the answer is:
uplifted
'elated' is the definition.
('uplift' can be a synonym of 'elate')
'been promoted' is the wordplay.
I cannot really see how this works, but
'promoted' could be 'up' (I've seen this in other clues) and 'up' is located in the answer.
The remaining letters 'lifted' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'having' is the link.
Can you help me to learn more?
(Other definitions for uplifted that I've seen before include "Elevated emotionally or morally" , "Raised or inspired" , "High" , "Mentally or morally elevated" , "Exalted" .)