Getting to be, with the advent of (8)

I believe the answer is:

becoming

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'getting' is the definition.
('become' can be a synonym of 'get')

'be with the advent of' is the wordplay.
'with' is a charade indicator (letters next to each other).
'the advent of' becomes 'coming' (I can't justify this - if you can you should believe this answer much more).
'be'+'coming'='BECOMING'

'to' is the link.

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(Other definitions for becoming that I've seen before include "Developing into" , "Suitable; fitting" , "Turning into; suiting" , "attractive" , "fetching" .)

I've seen this clue in the Evening Standard.

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