Sheer delight about EV promotion (9)

I believe the answer is:

elevation

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

'sheer delight about ev' is the wordplay.
'sheer delight' becomes 'elation' (elation is delight or glee. I am not sure about the 'sheer' bit.).
'about' means one lot of letters goes inside another.
'elation' enclosing 'ev' is 'ELEVATION'.

Can you help me to learn more?

(Other definitions for elevation that I've seen before include "High point" , "Height - promotion" , "Architectural drawing" , "Height above a given level" , "Side of a building; height" .)

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

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